Best Fitness Trackers For Swimming in 2026: Compared and Ranked

Introduction

The best fitness trackers for swimming do more than survive exposure to water. They should accurately record the metrics that matter in the pool or open water, whether that means counting lengths, identifying strokes, calculating SWOLF, measuring effort or mapping an outdoor swim with GPS.

The right device depends on how and where you swim. A recreational pool swimmer may prioritize simplicity, comfort and reliable lap counting. An open-water swimmer needs dependable GPS, usable physical controls and sufficient battery life. Triathletes require seamless multisport recording, while swimmers who want everyday smartwatch features must also consider phone compatibility, apps and battery trade-offs.

For this 2026 update, Wearable Fitness Tech compares current swimming trackers across swim-mode support, water resistance, pool metrics, open-water GPS, in-water heart-rate capability, battery life, wearability, software and overall value. We prioritize devices with genuine swimming functionality—not wearables that are merely described as water-resistant.

WFT Executive Brief

There is no single swimming tracker that is ideal for every swimmer.

• Pool swimmers should prioritize dependable length counting, stroke recognition, rest detection and clear in-water data.
• Open-water swimmers should look for a dedicated open-water mode, reliable GPS, practical controls and sufficient GPS battery life.
• Triathletes benefit from multisport transitions, structured training tools and broader performance analytics.
• Apple and Android users should consider ecosystem compatibility alongside swimming capability.
• Smart swim goggles provide an alternative for swimmers who want real-time metrics without repeatedly checking their wrist.
• Spending more does not automatically improve pool-lap accuracy; premium prices generally add mapping, training analytics, diving functions, battery life and smartwatch features.

WFT’s recommendations are based on verified manufacturer specifications, product documentation, current availability and relevant independent evidence. WFT has not yet completed hands-on swimming tests of every device in this guide. Specification-led conclusions and first-hand testing findings will therefore be identified clearly.

Best Swimming Trackers at a Glance

The table below compares the leading swimming trackers in 2026. Each WFT selection addresses a different combination of pool tracking, open-water capability, multisport training, smartphone compatibility and overall value. No single device is right for every swimmer, so the recommendations identify the strongest option for each principal use case.

Price note: Prices shown are indicative US list prices available when this guide was last reviewed. Promotions, regional pricing, taxes, accessories and replacement bands may affect the final price.

How WFT Selected the Best Swimming Trackers

We evaluated each device through the WFT Wearable Evaluation Framework. The framework weighs five areas:

Because swimming places different demands on a wearable than running, cycling or everyday activity tracking, we also considered seven category-specific questions:

1. Does the device provide meaningful pool metrics such as lengths, distance, pace, stroke recognition, stroke rate and SWOLF?
2. Can it track open-water swimming with onboard GPS, and how useful is the resulting route and distance data?
3. Does it support underwater heart-rate monitoring, and are the limitations of wrist-based measurement communicated clearly?
4. Can swimmers read and operate the device effectively with wet hands and while moving through the water?
5. Is its water-resistance rating appropriate for the recommended swimming environment?
6. Does it provide useful training tools for structured workouts, intervals, recovery and multisport events?
7. Does the supporting app make swim data understandable, exportable and useful without creating unreasonable subscription or ownership costs?

For more detail on how WFT separates specification verification, controlled checks, daily-life use and longer-term device evaluation, see the WFT Wearable Device Testing Protocol.

Our Top 7 Swimming Trackers for 2026

The seven devices below represent WFT’s strongest 2026 selections across pool swimming, open-water training, triathlon, real-time coaching, smartphone compatibility and budget. The order begins with the most complete overall swimming watch, but it should not be interpreted as a simple best-to-worst ranking: each device has been selected for a clearly defined swimmer and use case. Every review explains why the tracker stands out, where it compromises and who should—or should not—consider it.

1. Garmin fēnix 8 — Best Overall Swimming Watch

Garmin fēnix 8 is the strongest overall choice for swimmers who want one premium watch for pool training, open-water swimming and activities beyond the water. It is not the most affordable option, but it provides the broadest combination of swim metrics, GPS performance, training analysis, mapping and rugged hardware.

For pool swimming, the watch records lengths, distance, pace, stroke count, stroke rate, stroke type and SWOLF. It also supports drill logging, automatic rest detection, structured workouts and Critical Swim Speed testing. Stroke recognition covers freestyle, backstroke, breaststroke and butterfly, with mixed and drill classifications available for appropriate intervals.

Open-water mode adds GPS-based distance, pace, route and stroke information. Wrist-based heart rate remains available during swim activities, and compatible Garmin chest straps can provide an alternative where more dependable heart-rate data is required.

The fēnix 8 carries a 10-ATM water-resistance rating and supports recreational scuba and apnea diving to 40 metres. Garmin offers different case sizes and AMOLED or solar-display configurations, allowing buyers to prioritize display quality, wrist fit or extended battery life.

Why the Garmin fēnix 8 stands out

The principal advantage is its breadth. Many devices can count pool lengths, but fewer combine detailed pool analytics, open-water GPS, structured workouts, physical button control, recovery guidance and full multisport support in one platform.

Garmin Connect brings swim sessions together with Training Readiness, Training Status, recovery time, training load, HRV Status, sleep information and Body Battery. This makes the watch particularly useful for swimmers whose training also includes cycling, running, strength work or triathlon preparation.

Physical controls are another practical advantage in the water. The watch’s leakproof buttons reduce dependence on touchscreen interaction when hands are wet, while its rugged construction is suitable for regular pool and outdoor use.

Where the Garmin fēnix 8 compromises

The most obvious limitation is price. Starting around $999.99, the fēnix 8 costs considerably more than value-focused multisport models such as the COROS PACE 4 and specialist swim tools such as FORM Smart Swim 2.

It is also a substantial watch. Although multiple case sizes are available, swimmers with smaller wrists or those who prefer a lightweight training device may find a Forerunner or COROS model more comfortable.

Garmin’s extensive feature set creates a steeper learning curve as well. Casual swimmers who only want automatic lap counting and basic post-swim summaries are unlikely to use enough of its training, navigation and outdoor capabilities to justify the additional cost.

Key Strengths and Limitations

WFT Verdict

The Garmin fēnix 8 is the most complete swimming and multisport watch in this guide. It combines detailed pool and open-water tracking with dependable GPS, extensive training analytics, strong battery life and rugged hardware suited to demanding aquatic and outdoor environments.

Its premium price and substantial design will be unnecessary for casual swimmers. For athletes who want one durable watch to support swimming, multisport training, recovery and outdoor navigation, however, the fēnix 8 offers the strongest overall package.

2. Apple Watch Ultra 3 — Best for iPhone Users

Apple Watch Ultra 3 is the most compelling swimming tracker for athletes already using an iPhone. It combines automatic pool tracking, open-water GPS, customizable workout views and detailed post-swim summaries with Apple’s broader health, safety and smartwatch ecosystem.

During pool sessions, Ultra 3 can record laps, total distance, average pace, heart rate, splits, automatic sets and SWOLF. It automatically detects strokes and stroke counts, including kickboard activity. Swimmers can also create custom pool workouts with haptic cues that signal the next interval without requiring constant interaction with the display.

For open-water swimming, the watch uses precision dual-frequency GPS to record distance, pace and route information. Its customizable workout views make it possible to prioritize the metrics that matter most during a session.

The 49 mm titanium watch has a WR100 water-resistance rating and supports swimming, snorkeling, high-speed water sports and recreational diving to 40 metres. The integrated depth gauge and water-temperature sensor add value for open-water swimmers and recreational divers. The 100-metre water-resistance rating should not be interpreted as permission to scuba dive below Apple’s stated 40-metre limit.

Why Apple Watch Ultra 3 stands out

The display and software experience are its principal advantages. The always-on display reaches up to 3,000 nits, making workout information easier to read in bright outdoor conditions. The customizable Action button can also provide direct physical control when touchscreen interaction is inconvenient.

Apple’s automatic set detection and streamlined workout summaries make the watch approachable for recreational swimmers, while custom workouts, haptic interval cues and third-party swim applications extend its usefulness for more structured training.

Ultra 3 also works as a complete everyday smartwatch. Calls, messages, payments, music, health monitoring and safety features remain integrated with the same device used for swim training. Core tracking does not require a paid membership, although Apple Fitness+ and some third-party applications are optional paid services.

Battery life reaches up to 42 hours in normal use and up to 72 hours in Low Power Mode. This represents a substantial improvement over standard Apple Watch models, although it still trails many Garmin and COROS sports watches.

Where Apple Watch Ultra 3 compromises

Compatibility is the clearest limitation. Apple Watch Ultra 3 requires an iPhone and is not an option for Android users.

The single 49 mm case can also feel large on smaller wrists. Fit matters during swimming because excessive movement can reduce comfort and affect optical heart-rate readings. Buyers should also select a band designed to remain secure during water activities.

Although Apple now offers training load, recovery-oriented health information and advanced workout tools, its native performance ecosystem remains less specialized than Garmin’s for athletes managing complex multisport training.

Battery life is sufficient for routine pool sessions and most open-water workouts, but athletes completing long events or multi-day training may prefer the longer endurance available from Garmin and COROS.

Key Strengths and Limitations

WFT Verdict

The Apple Watch Ultra 3 is the best swimming smartwatch for iPhone users. It provides a strong combination of pool and open-water tracking, excellent display visibility, health monitoring, safety features and access to Apple’s extensive app ecosystem.

Its battery life remains shorter than that of dedicated Garmin and COROS sports watches, and its value depends heavily on using the wider Apple ecosystem. For iPhone owners who want capable swimming features alongside premium everyday smartwatch functionality, the Ultra 3 is the most compelling choice.

3. Garmin Forerunner 970 — Best for Triathletes

Garmin Forerunner 970 is designed for athletes whose swimming forms part of a broader multisport training programme. It supports pool swimming, open-water swimming, triathlon, pool triathlon, swimrun, duathlon, brick workouts and mixed multisport sessions.

Pool metrics include distance, pace, lengths, stroke count, stroke rate, stroke type and SWOLF. The watch also supports drill logging, automatic rest detection, structured swim workouts and Critical Swim Speed, helping swimmers assess sustainable pace and monitor progress.

Open-water mode uses onboard GPS to record distance, pace, route and stroke information. As with any wrist-based GPS watch, open-water accuracy depends partly on the watch regularly clearing the surface. Breaststroke, underwater swimming and irregular stroke patterns can reduce the available satellite signal.

The Forerunner 970 uses a bright AMOLED display protected by a sapphire-crystal lens, with physical buttons available when touchscreen operation is impractical. Its titanium bezel and lighter performance-oriented design make it more comfortable for racing than the heavier fēnix 8.

Why the Garmin Forerunner 970 stands out

Its main advantage is the integration between swimming, cycling and running. Athletes can record complete multisport events, manage transitions and examine each discipline within Garmin Connect rather than combining information from separate devices or applications.

Garmin’s wider training system adds Training Readiness, Training Status, recovery time, training load, HRV Status and adaptive coaching. This makes the Forerunner 970 better suited to planning an entire race programme than a dedicated swimming watch.

Battery life reaches up to 15 days in smartwatch mode and up to 26 hours in GPS-only mode. That is comfortably sufficient for regular swim training and most triathlon events, although it does not match the longest-lasting fēnix and COROS configurations.

At $749.99, the Forerunner 970 remains expensive, but it costs less than the fēnix 8 and places more emphasis on lightweight racing and multisport performance than rugged outdoor or diving capability.

Where the Garmin Forerunner 970 compromises

The watch carries a 5-ATM water-resistance rating, compared with the fēnix 8’s 10-ATM rating. It is suitable for pool and open-water swimming but is not designed as a recreational dive watch.

It is also available in only one 47 mm case size. Although lighter than the fēnix 8, athletes with particularly small wrists may prefer a more compact model.

The amount of data available through Garmin Connect can require time to configure and understand. Swimmers who do not run, cycle or compete in multisport events may receive better value from the COROS PACE 4 or, for specialist swim coaching, FORM Smart Swim 2.

Key Strengths and Limitations

WFT Verdict

The Garmin Forerunner 970 is the strongest choice for triathletes who need detailed swimming data within a broader swim-bike-run training system. It brings together pool and open-water tracking, multisport transitions, structured workouts, recovery guidance and advanced performance analytics in a lighter package than the fēnix 8.

It lacks the fēnix 8’s rugged construction and diving capability, while its premium price may be difficult to justify for recreational swimmers. For committed triathletes and performance-focused endurance athletes, however, the Forerunner 970 delivers the most focused balance of training depth, wearability and multisport functionality.

4. COROS PACE 4 — Best-Value Multisport Watch

COROS PACE 4 is the value leader in this guide. At $249, it provides pool swimming, open-water GPS, triathlon and customizable multisport modes alongside an AMOLED display, dual-frequency GPS and substantially longer battery life than many more expensive smartwatches.

Pool Swim mode automatically recognizes freestyle, breaststroke, backstroke and butterfly. It can record lengths, distance, pace, stroke count, stroke rate, distance per stroke, heart rate and SWOLF. Swimmers can also separate sets manually or use automatic rest detection.

Structured pool workouts can be created through the COROS app or configured directly on the watch. The available interval tools support regular work-and-rest sessions as well as send-off-time workouts, making PACE 4 useful for swimmers following a defined training programme.

Open Water mode records distance, pace, strokes, stroke rate, heart rate, laps and SWOLF. COROS supports freestyle for GPS-tracked open-water sessions because the watch must regularly clear the surface to regain a satellite signal.

Why COROS PACE 4 stands out

PACE 4 combines current hardware with a remarkably low weight. It weighs approximately 32 grams with the nylon band or 40 grams with the silicone band, making it considerably less intrusive than premium outdoor watches.

The 1.2-inch AMOLED display provides a modern interface, while two buttons and a digital dial offer physical control during workouts. Its 5-ATM rating supports pool and surface-water activities but not diving.

Battery life reaches up to 19 days in daily use and 41 hours in the high-accuracy All Systems GPS mode. This gives open-water swimmers and triathletes considerably more endurance than most mainstream smartwatches.

Triathlon mode records three activities and two transitions, with the disciplines customizable between open-water swimming, pool swimming, cycling and running. Multisport mode supports more flexible combinations for training sessions or non-standard events.

COROS does not require a subscription for its core training, recovery and analysis tools. The platform also supports connections with services such as Strava and TrainingPeaks.

Where COROS PACE 4 compromises

Although PACE 4 supports extensive swim data, COROS remains more strongly associated with running and endurance training than dedicated swim coaching. Garmin provides a broader recovery, navigation and coaching ecosystem, while FORM offers more immediate technique feedback in the water.

Open-water GPS tracking officially supports freestyle. Breaststroke, backstroke and butterfly keep the watch submerged too long for reliable satellite reception and are therefore not supported for dependable route and distance tracking.

The watch provides breadcrumb navigation rather than full onboard maps. Its music support also relies on locally stored MP3 files rather than direct Spotify or Apple Music integration.

Finally, the 5-ATM rating is intended for surface swimming. PACE 4 should not be treated as a recreational dive watch.

Key Strengths and Limitations

WFT Verdict

The COROS PACE 4 delivers the strongest performance-to-price ratio in the guide. At approximately $249, it combines pool, open-water, triathlon and multisport tracking with structured pool workouts, dual-frequency GPS, long battery life and a lightweight design.

It does not offer the mapping depth, app ecosystem or everyday smartwatch functionality of the more expensive Garmin, Apple and Samsung models. For swimmers and developing triathletes who prioritize reliable training tools over premium connected features, the PACE 4 represents exceptional value.

5. Samsung Galaxy Watch Ultra2 — Best for Android Users

The Samsung Galaxy Watch Ultra2 is the strongest Android-focused alternative to the Apple Watch Ultra. It combines swimming and multisport tracking with Samsung Health, LTE connectivity, navigation, safety features and extensive everyday smartwatch functionality.

It is also a substantial hardware upgrade over the original Galaxy Watch Ultra. Samsung has equipped the Ultra2 with a titanium case, a larger 800 mAh battery and a 1.52-inch display capable of reaching 5,000 nits. That exceptional brightness should make workout information easier to read in direct sunlight and underwater.

Why Galaxy Watch Ultra2 Stands Out

The Galaxy Watch Ultra2 supports both pool and open-water swimming, making it suitable for recreational swimmers, outdoor swimmers and multisport athletes. Its built-in GPS records outdoor routes, while Samsung Health brings swimming alongside the user’s other workouts, sleep, recovery and health information.

Its water credentials are particularly impressive. The watch carries 10 ATM and IP69K ratings and is certified to the EN13319 international standard for diving instruments.

Samsung’s Depth app can display current depth, water temperature and elapsed dive time during recreational dives down to approximately 40 metres or 130 feet. This makes the Ultra2 more capable underwater than a conventional general-purpose smartwatch, although divers should still follow Samsung’s operating guidance and established dive-safety procedures.

The Marine Band’s drainage-focused design, bright display and rugged titanium construction further strengthen its suitability for regular swimming and other water-based activities.

Where Galaxy Watch Ultra2 Falls Short

The Ultra2 is a large 47mm premium watch and may feel bulky on smaller wrists, particularly during longer pool sessions. Its launch price of approximately $699.99 also puts it firmly in flagship territory.

Although Samsung Health provides a broad fitness and wellness experience, competitive swimmers may find that Garmin, Polar or FORM offers more specialized swim-training analysis, structured workouts and performance-focused coaching.

Compatibility is another important limitation. The Galaxy Watch Ultra2 requires an Android phone running Android 13 or later, and some health and Galaxy AI features work best—or exclusively—within Samsung’s Galaxy ecosystem. It is not compatible with the iPhone.

Key Strengths and Limitations

WFT Verdict

The Samsung Galaxy Watch Ultra2 is the best choice in this guide for Android users who want one premium device for swimming, recreational diving, health monitoring and everyday connected features.

It is not the most specialized swimming watch, but its combination of serious water protection, a highly visible display, GPS, Samsung Health and full smartwatch functionality makes it one of the most versatile aquatic wearables available.

6. FORM Smart Swim 2 — Best for Real-Time Swim Coaching

The FORM Smart Swim 2 takes a fundamentally different approach from the watches in this guide. Instead of recording a workout on the wrist for analysis afterward, these smart goggles place swimming data directly in front of the athlete through an augmented-reality display.

Swimmers can view metrics including time, distance, pace, heart rate, stroke rate, stroke count, distance per stroke, split times and calories without interrupting a length or looking toward a poolside clock.

At approximately $199, the Smart Swim 2 is a specialist training tool rather than an everyday fitness tracker. Its value depends on how frequently you swim and whether access to immediate feedback will meaningfully improve your training.

Why FORM Smart Swim 2 Stands Out

FORM’s strongest advantage is its ability to deliver information while the swimmer is still in the water. The customizable display can show the metrics most relevant to the workout, while automatic stroke and rest detection reduces the need to operate buttons at the end of each length.

An integrated optical sensor measures heart rate at the temple, allowing swimmers to monitor exercise intensity without using a separate chest strap or arm-mounted sensor.

The goggles are designed for pool, open-water and swim-spa use. FORM’s SwimStraight digital compass provides directional guidance in open water, while completed workouts synchronize with the FORM app for more detailed post-swim analysis.

Core tracking functions do not require a subscription. However, FORM Premium adds guided workouts, training plans, the workout builder and HeadCoach technique analysis. It currently starts at approximately $9.99 per month following the introductory trial.

Where FORM Smart Swim 2 Falls Short

The Smart Swim 2 cannot replace an everyday fitness tracker or multisport watch. It does not provide continuous activity monitoring, sleep tracking, recovery guidance or general smartwatch functionality outside the water.

Open-water functionality also requires an important qualification. The goggles can independently record heart rate, stroke rate and elapsed time, but GPS-based distance and pace require pairing with a compatible Garmin or Apple Watch.

Fit is more personal than it is with a wrist-worn device. Although FORM supplies five interchangeable nose bridges and replaceable contoured eye seals, comfort, water sealing and display visibility will vary between swimmers.

Key Strengths and Limitations

WFT Verdict

FORM Smart Swim 2 provides the most immediate and immersive swimming feedback in this guide. Its in-goggle display is particularly valuable for swimmers following structured sessions, maintaining target pace or working on stroke efficiency.

It is best viewed as a specialist swimming companion rather than a conventional fitness tracker. Competitive swimmers, triathletes and committed recreational swimmers stand to gain the most from its real-time guidance.

7. Amazfit Bip Max — Best Budget Swimming Watch Under $100

The Amazfit Bip Max provides an unusually broad collection of swimming, fitness and everyday smartwatch features while remaining below $100.

It supports pool swimming, open-water swimming, fin swimming and artistic swimming. Built-in GPS allows outdoor swimmers to record their activities without carrying a phone, while structured training and interval templates can be configured for pool workouts.

At approximately $99.99, the Bip Max sits at the upper edge of the budget category. However, its combination of aquatic modes, a bright AMOLED display, long battery life and broader training functionality makes it a more capable swimming watch than most alternatives at this price.

Why Amazfit Bip Max Stands Out

The Bip Max is more than a water-resistant everyday smartwatch. Swimming is included as a dedicated part of its sports platform, with separate modes for pool, open-water, fin and artistic swimming.

Pool swimming is also supported by Amazfit’s training and interval templates. This enables swimmers to add more structure to their sessions instead of relying solely on passive workout recording.

For outdoor swimming, the watch includes built-in GPS with support for five satellite systems. Although it is not a dual-frequency positioning system, it gives recreational open-water swimmers the ability to record their sessions independently of a smartphone.

The large 2.07-inch AMOLED display can reach up to 3,000 nits. This should make workout information easier to read in bright outdoor conditions, although the watch’s size will not suit every swimmer.

Battery performance is another major advantage. Amazfit quotes up to 20 days of typical use, up to 10 days with heavy use and up to 40 hours of continuous GPS tracking.

Beyond Swimming

The Bip Max supports more than 150 sports modes and extends beyond basic activity tracking with Zepp Coach, PeakBeats workout analysis, HRV monitoring and BioCharge energy guidance.

Its 4GB of onboard storage can be used for offline maps and podcasts, while integration with Strava, TrainingPeaks, Runna, Intervals.icu, Apple Health and Google Fit gives users several options for managing their training data.

Core fitness, health and workout analysis is available through the Zepp app without a required subscription.

Where Amazfit Bip Max Falls Short

The Bip Max cannot match Garmin, COROS or FORM for specialist swim analysis, advanced coaching or the interpretation of long-term training performance. It is best suited to recreational and developing swimmers rather than competitive athletes.

Its single-frequency GPS system is also less advanced than the dual-frequency positioning available on more expensive multisport watches.

Size is another consideration. The Bip Max measures approximately 49.6 × 42.8mm, is 13.2mm thick at the sensor and weighs 52.6 grams with its strap. Swimmers with smaller wrists may find the lighter Amazfit Bip 6 more comfortable.

Its 5-ATM water-resistance rating is suitable for swimming and shallow-water use but not for diving. The $99.99 list price also leaves virtually no margin beneath the under-$100 ceiling, so readers should confirm the current selling price before purchasing.

Key Strengths and Limitations

WFT Verdict

The Amazfit Bip Max is the most feature-complete swimming watch we identified below $100. Its dedicated aquatic modes, pool-workout templates, built-in GPS, bright display and exceptional battery life create a compelling package for budget-conscious swimmers.

It should not be mistaken for a premium performance watch, but recreational swimmers who want capable aquatic tracking alongside everyday health, fitness and smartwatch features will find considerable value here.

Lower-Cost Alternative

If size and price matter more than the Bip Max’s brighter display, structured pool workouts and extended battery life, the Amazfit Bip 6 remains a strong alternative at approximately $79.99. It supports the same four aquatic modes in a smaller, lighter design.

Readers can explore that option in the WFT in-depth Amazfit Bip 6 review.

Buying Guide: How to Choose the Best Fitness Tracker for Swimming

The best fitness tracker for swimming is not necessarily the device with the longest specification list. It is the one that supports the type of swimming you actually do, provides the metrics you will use and fits comfortably into your wider training and technology ecosystem.

Before comparing individual models, start with the following decisions.

1. Begin With Where and How You Swim

Pool swimming, open-water swimming, triathlon and recreational diving place different demands on a wearable.

• Pool swimmers should prioritize accurate length counting, automatic stroke recognition, rest detection, pace, stroke rate, drill logging and SWOLF. Reliable physical controls are also valuable when starting intervals or recording drills with wet hands.

• Open-water swimmers need a dedicated open-water profile and onboard GPS. Battery life, display visibility, route accuracy and physical controls become more important because there are no pool walls to help calculate distance.

• Triathletes should look beyond swimming metrics. Multisport recording, transition tracking, structured workouts, recovery guidance and compatibility with cycling and running sensors may be equally important.

• Recreational divers require more than ordinary water resistance. Choose only a device that explicitly supports diving and provides an appropriate depth rating or certification. A swimming watch should never be assumed to be suitable for diving simply because it carries a 5-ATM or 10-ATM rating.

2. Decide Whether You Need a Sports Watch, Smartwatch or Smart Goggles

A dedicated sports watch is usually the strongest option for swimmers who also run, cycle, compete in triathlons or follow structured training plans. Devices such as the Garmin fēnix 8, Garmin Forerunner 970 and COROS PACE 4 combine swimming with broader performance and recovery analysis.

A premium smartwatch may be more suitable if swimming is one part of your everyday routine. Apple Watch Ultra 3 and Samsung Galaxy Watch Ultra2 add communications, apps, payments, safety features and deeper smartphone integration, although battery life is generally shorter than on dedicated sports watches.

FORM Smart Swim 2 takes a different approach. Its augmented-reality display places metrics directly in the swimmer’s field of view. This makes it valuable for real-time feedback and guided training, but it does not replace an everyday watch or fitness tracker.

A budget watch such as Amazfit Bip Max can provide the essential swim modes, GPS and everyday health tracking many recreational swimmers need without the cost and complexity of a premium training platform.

3. Identify the Swim Metrics You Will Actually Use

Most swimmers do not need every available metric. Focus on the measurements that support your training goals.

Useful pool metrics include:

• Lengths and total distance
• Interval time and pace
• Stroke type
• Stroke count and stroke rate
• Rest detection
• Drill logging
• SWOLF
• In-water heart rate

SWOLF combines the time and number of strokes required to complete a pool length. It can help track changes in swimming efficiency, but it should not be treated as a universal performance score. Compare SWOLF across similar strokes, pool lengths and workout conditions rather than comparing it directly with another swimmer’s score.

For open-water swimming, GPS distance, route, pace and stroke information become more important. GPS performance can vary with stroke style, satellite visibility, waves and how frequently the watch leaves the water during each stroke cycle.

4. Understand Water-Resistance Ratings

A 5-ATM rating is generally the practical minimum for a swimming watch. It is commonly suitable for pool swimming and surface-water activities when the manufacturer explicitly supports those uses.

A 10-ATM rating provides a greater pressure margin and may be preferable for frequent open-water use, high-speed water activities or more demanding aquatic environments. However, neither rating automatically confirms that a watch is suitable for scuba diving.

Diving capability should be supported by an explicit manufacturer depth rating, a dedicated dive mode and, where applicable, a recognized standard such as EN13319.

Water resistance can also deteriorate over time through impact damage, ageing seals or improper servicing. Rinse the device with fresh water after exposure to chlorine or salt water and follow the manufacturer’s guidance on operating buttons underwater.

For a deeper explanation, see WFT’s guide to IPX and ATM water-resistance ratings.

5. Treat Underwater Heart Rate as a Useful Estimate

Optical heart-rate sensors can work during swimming, but water movement, wrist position, skin contact and stroke mechanics can affect their accuracy.

For general fitness tracking, wrist-based heart rate may be sufficient for identifying broad effort trends. Athletes who rely on heart-rate zones for structured training should check whether the watch supports a compatible swimming heart-rate strap or stored heart-rate data.

The FORM Smart Swim 2 measures heart rate at the temple, offering an alternative to wrist-based measurement. Regardless of sensor position, heart-rate readings should be interpreted alongside pace, perceived effort and the structure of the workout.

6. Consider Controls, Visibility and Wrist Fit

A watch that performs well on land may still be frustrating to use in the water.

Physical buttons are generally easier to operate than touchscreens during intervals, in rain or with wet hands. A bright, high-contrast display helps when checking pace or distance quickly, although an always-on display may reduce battery life.

Size and weight also matter. Larger watches may provide better visibility and longer battery life but can feel bulky on smaller wrists or create additional drag. A secure, comfortable band is essential because movement between the sensor and skin can affect heart-rate readings.

7. Compare the Right Battery Figures

Manufacturers frequently publish several battery estimates, including smartwatch mode, GPS mode, low-power mode and always-on-display use. These figures are not directly interchangeable.

Pool swimming normally consumes less power than continuous open-water GPS recording. Open-water swimmers, triathletes and endurance athletes should therefore compare GPS activity time rather than relying only on the quoted number of days in smartwatch mode.

Also allow for battery degradation, music playback, navigation, cellular connectivity, display settings and cold-water conditions. Choose a device with a comfortable margin above the duration of your longest expected activity.

8. Check Phone Compatibility, Apps and Subscriptions

The supporting ecosystem can be as important as the watch itself.

Apple Watch Ultra 3 requires an iPhone. Samsung Galaxy Watch Ultra2 requires Android and provides its deepest integration within the Samsung Galaxy ecosystem. Garmin and COROS provide broader phone compatibility and place greater emphasis on training analysis.

Check whether the platform can export or synchronize data with services you already use, such as Strava, TrainingPeaks or Apple Health. Also determine whether important coaching, recovery or workout features require a paid subscription.

FORM’s core tracking functions can be used without a subscription, but its guided workouts, training plans and advanced coaching tools are part of FORM Premium.

9. Calculate the Total Cost of Ownership

The purchase price is only one part of the decision. Potential additional costs include:

• Coaching or analytics subscriptions
• Replacement straps or goggle seals
• Compatible heart-rate sensors
• Charging accessories
• Premium training apps
• Cellular service for LTE-enabled watches

Under $100, the Amazfit Bip Max provides an accessible starting point for recreational swimmers. At approximately $199 to $249, FORM Smart Swim 2 and COROS PACE 4 serve very different needs: specialist in-water feedback versus a versatile multisport watch. Premium models justify their higher prices primarily through broader training analytics, mapping, diving capability, recovery tools and smartwatch functionality.

Comparison Table: Best Fitness Trackers for Swimming

This table compares the top fitness trackers for swimming, highlighting five key features: water resistance, GPS functionality, accurate in-water heart rate tracking, battery life, and advanced swim metrics (stroke analysis and SWOLF score where available). Quickly compare models to find the best fit for your swimming goals and budget.

Specification note: Battery figures are manufacturer maximums and vary with display, GPS, music, connectivity and workout settings. Water-resistance ratings describe tested conditions and should not be interpreted as unrestricted operating-depth guarantees. FORM Premium is optional but required for its advanced coaching, training plans and full guided-workout platform.

Frequently Asked Questions About Swimming Trackers

What is the best fitness tracker for swimming?

The Garmin fēnix 8 is WFT’s best overall swimming watch because it combines detailed pool and open-water tracking with advanced training analytics, multisport support, long battery life and recreational diving capability.

The best device still depends on your priorities. The Apple Watch Ultra 3 is best for iPhone users, the Samsung Galaxy Watch Ultra2 is best for Android users, the Garmin Forerunner 970 is best for triathletes, and the FORM Smart Swim 2 is best for real-time coaching.

How accurate are fitness trackers when swimming?

Accuracy depends on the device, swimming environment and metric being measured.

In a pool, watches estimate distance using the selected pool length, detected turns and wrist movement. Strong push-offs and consistent strokes generally produce the best results. Kickboard drills, mid-length stroke changes and missed turns can affect lap counting.

In open water, accuracy depends heavily on GPS reception. Because the watch repeatedly moves above and below the surface, GPS tracks may be less consistent than during running or cycling. Freestyle typically produces the most reliable results because the wrist regularly clears the water.

What is the difference between pool and open-water tracking?

Pool tracking calculates distance from the selected pool length and number of completed lengths. GPS is normally disabled because satellite signals do not work reliably indoors or underwater.

Open-water tracking uses GPS to estimate route, distance and pace in lakes, rivers or the ocean. Swimmers who train in both environments should choose a device with dedicated pool and open-water modes.

The FORM Smart Swim 2 can independently record heart rate, stroke rate and elapsed time in open water, but GPS-based distance and pace require a compatible Apple or Garmin Watch.

Is a 5-ATM fitness tracker suitable for swimming?

A 5-ATM rating is generally suitable for pool swimming and manufacturer-approved shallow-water activities. It does not mean the device can be operated freely at a depth of 50 metres, and it should not be interpreted as diving certification.

For diving or higher-pressure aquatic activities, choose a device explicitly approved for that purpose. In this guide, the Garmin fēnix 8, Apple Watch Ultra 3 and Samsung Galaxy Watch Ultra2 support recreational diving to 40 metres.

Read WFT’s guide to IPX and ATM water-resistance ratings for a more detailed explanation.

Can a fitness tracker measure heart rate while swimming?

Several current watches can record wrist-based heart rate during swimming. However, optical readings may be less consistent underwater because water movement and watch fit can interfere with the sensor.

The FORM Smart Swim 2 measures heart rate at the temple through a sensor built into the goggles. Compatible Garmin watches can also use supported swimming heart-rate straps, which store workout data for synchronization after the swim.

Heart-rate information from consumer wearables should be treated as training guidance rather than medical-grade measurement.

What is SWOLF, and does a lower score always mean better swimming?

SWOLF combines the time required to complete a pool length with the number of strokes taken. Swimming one length in 30 seconds using 15 strokes produces a SWOLF score of 45.

A lower score can indicate improved efficiency, but SWOLF should be compared under similar conditions. Pool length, stroke type, pace, fatigue and body dimensions can all affect the result.

It is most useful for tracking your own efficiency over time rather than comparing your score directly with another swimmer’s.

Do I need a subscription for swim tracking?

The Garmin, Apple, COROS, Samsung and Amazfit watches in this guide do not require a subscription for their core swimming and workout-tracking features.

FORM Smart Swim 2 also provides its essential metrics without a subscription. FORM Premium is optional but required for advanced guided workouts, HeadCoach technique analysis, training plans and workout-building tools.

Third-party services such as Strava, TrainingPeaks, MySwimPro or iFIT may charge separately for premium functionality.

How much battery life do I need for swimming?

Most swimmers need enough battery for the planned session plus a reasonable safety margin. Daily battery figures and continuous GPS figures should not be treated as interchangeable.

The FORM Smart Swim 2 provides up to 14 hours of swimming use. The Apple Watch Ultra 3 offers up to 42 hours of normal use, while Garmin, COROS and Amazfit watches can run for several days between charges.

Continuous GPS, an always-on display, music, navigation and cellular connectivity will reduce battery life. Charge the device before an important open-water session or race rather than relying solely on the remaining percentage estimate.

Can I use a swimming tracker for scuba diving?

Only use a wearable for scuba diving when the manufacturer explicitly approves it and specifies its operating depth.

The Garmin fēnix 8, Apple Watch Ultra 3 and Samsung Galaxy Watch Ultra2 support recreational diving to 40 metres. The Garmin Forerunner 970, COROS PACE 4 and Amazfit Bip Max are intended for surface swimming and should not be treated as dive computers.

A water-resistance rating by itself is not evidence that a watch is suitable for scuba diving.

Should I choose a swimming watch or FORM smart goggles?

Choose a swimming watch if you want one device for all-day activity, health, recovery, running, cycling and everyday use.

Choose FORM Smart Swim 2 if your priority is seeing pace, distance, heart rate and workout instructions without looking at your wrist. The goggles provide the most immediate in-water feedback but cannot replace an everyday smartwatch or fitness tracker.

Some committed swimmers use both: a watch for GPS, multisport tracking and recovery data, and FORM goggles for real-time pool or open-water feedback.

How should I care for a fitness tracker after swimming?

Rinse the device and band with fresh water after exposure to chlorine or salt water, then dry them thoroughly before charging. Do not insert charging cables or place the device on a charger while it is wet.

Follow the manufacturer’s instructions concerning underwater button use, allowable water temperatures and band materials. Water resistance can diminish over time, particularly after impacts, repairs or prolonged exposure to chemicals and extreme temperatures.

How do I choose the right swimming tracker for my needs?

Start with where you swim, the metrics you need and the other sports or everyday functions you expect from the device.

Pool swimmers should prioritize reliable lap and stroke tracking, while open-water swimmers need built-in GPS and sufficient GPS battery life. Triathletes should also look for continuous multisport recording and transition support.

For a detailed decision process, see WFT’s guide on how to choose the right fitness tracker for swimming.

Final Verdict: Which Swimming Tracker Should You Choose?

The best swimming tracker is not necessarily the device with the longest specification list. It is the one that matches where you swim, how seriously you train, the smartphone ecosystem you use and what you expect the device to do outside the water.

Our seven recommendations address distinct types of swimmer:

• Best overall: Choose the Garmin fēnix 8 for the strongest combination of pool and open-water tracking, multisport analytics, battery life, navigation and rugged aquatic capability. Check Garmin fēnix 8 on Amazon.
• Best for iPhone users: Choose the Apple Watch Ultra 3 for capable swimming features, recreational diving and premium everyday smartwatch functionality within the Apple ecosystem. Check Apple Watch Ultra 3 on Amazon.
• Best for triathletes: Choose the Garmin Forerunner 970 for detailed swim-bike-run analysis, structured workouts, recovery guidance and continuous multisport recording. Check Garmin Forerunner 970 on Amazon.
• Best-value multisport watch: Choose the COROS PACE 4 for pool and open-water tracking, triathlon support, dual-frequency GPS and long battery life at a substantially lower price than the premium watches. Check COROS PACE 4 on Amazon.
• Best for Android users: Choose the Samsung Galaxy Watch Ultra2 for swimming, recreational diving, Samsung Health and comprehensive connected-watch features. Check Samsung Galaxy Watch Ultra2 on Amazon.
• Best for real-time swim coaching: Choose the FORM Smart Swim 2 if you want pace, heart rate, distance and workout instructions displayed directly inside your goggles. Check FORM Smart Swim 2 on Amazon.
• Best budget option under $100: Choose the Amazfit Bip Max for pool and open-water modes, built-in GPS, structured pool workouts and exceptional battery life at an accessible price. Check Amazfit Bip Max on Amazon.

Before purchasing, confirm smartphone compatibility, current pricing and the manufacturer’s approved uses for swimming, diving and high-speed water activities. Water resistance can diminish over time and should never be interpreted more broadly than the manufacturer’s guidance.

Share Your Experience

Which swimming tracker do you currently use, and which metrics matter most during your sessions? Share your experience in the comments to help other swimmers make a more informed choice.