Finding the right smartwatch for fitness isn’t just about counting steps or checking notifications—it’s about choosing a device that actually improves how you train, recover, and understand your body. After testing the latest releases from Apple, Garmin, Samsung, and others throughout 2024 and into 2025, I’ve narrowed down the options to help you find your perfect match.
Whether you’re training for a marathon, lifting weights regularly, or simply want to move more throughout the day, the right watch can make a measurable difference. Here’s my comprehensive breakdown of the best fitness smartwatches you can buy right now.
How We Tested These Smartwatches
Before diving into the recommendations, you deserve to know how these watches earned their spots. Every device on this list underwent at least three weeks of real-world testing across multiple workout types. I tracked runs with GPS, recorded strength training sessions, monitored sleep patterns, and compared heart rate accuracy against chest strap monitors.
The testing criteria prioritized what actually matters for fitness: GPS accuracy (within 2% of known distances), heart rate reliability during interval training, battery life during extended activities, and software ecosystem compatibility. Comfort during all-day wear and swim tracking performance rounded out the evaluation.
I also considered factors like app ecosystem, third-party integrations, and how intuitive each device is to use mid-workout when your hands are sweaty and you’re trying to change screens quickly.
Best Overall: Apple Watch Ultra 2
The Apple Watch Ultra 2 remains the top choice for most fitness enthusiasts, and for good reason. This is essentially a sports watch disguised as an everyday smartwatch, combining Apple’s software ecosystem with serious athletic capabilities.
The 49mm titanium case houses dual speakers, a precision GPS system, and a 36-hour battery life (up to 72 in low-power mode). During my testing, the Ultra 2 maintained heart rate accuracy within 2-3 beats per minute of my chest strap during threshold runs—a remarkable achievement.
What sets it apart isn’t just the hardware. The Activity app provides detailed workout data, while watchOS 11 introduced the Training Load feature that helps prevent overtraining. The Depth app for swimming is genuinely useful, and the Action Button lets you start intervals or mark laps without fiddling with the touchscreen.
The trade-off? It’s expensive at $799, and if you’re invested in Android, you lose some functionality. But for iPhone users who want one watch to do everything, this is the standard to beat.
Best Value: Garmin Forerunner 165
Not everyone needs to spend nearly a thousand dollars on a fitness watch, and that’s where the Garmin Forerunner 165 shines. At $299, it delivers most of what the Ultra 2 offers at a fraction of the price.
This is Garmin’s most accessible GPS watch with an AMOLED display, making it the first affordable option in their lineup to match the crisp screen quality of Apple and Samsung devices. The battery lasts up to 11 days in smartwatch mode and 19 hours in GPS mode—more than enough for a full marathon plus recovery tracking.
The Forerunner 165 includes built-in GPS with multi-band positioning for excellent route accuracy, daily suggested workouts that adapt based on your recovery status, and Garmin’s reliable sleep and stress tracking. It handles swim workouts and provides VO2 max estimates that have proven surprisingly accurate in my experience.
The trade-off is more limited smart features compared to Apple. You get notifications and music controls, but you can’t respond to messages or use apps extensively. For pure fitness tracking, though, this is excellent value.
Best for Runners: Garmin Forerunner 965
Serious runners need more than basic GPS—they need tools that help them improve. The Garmin Forerunner 965, priced at $599, is specifically designed for runners who want to analyze and optimize their performance.
The 1.4-inch always-on AMOLED display is the largest in Garmin’s Forerunner line, making it easy to read pace and metrics at a glance while moving. The Training Readiness score combines sleep, recovery, stress, and acute training load into a single number telling you whether you should push hard or take an easy day.
What really sets the 965 apart is its mapping capabilities. You get full color topographical maps with trendline popularity routing, meaning you can discover new routes other runners have mapped out. The ClimbPro feature shows elevation gain and gradient for upcoming climbs during courses, which is invaluable for trail runners and anyone tackling hilly race courses.
The battery life extends to 23 days in smartwatch mode and 31 hours in GPS mode with music—more than enough for ultra-marathons. If running is your primary sport and you want every possible data point to improve, this is the watch to get.
Best for Swimmers: Apple Watch Ultra 2
Swimming presents unique challenges for wearable tracking. Water resistance is just the beginning—you need accurate stroke detection, reliable lap counting, and workout recognition that doesn’t trigger falsely when you’re treading water.
The Apple Watch Ultra 2 excels here with a depth sensor rated to 40 meters, automatic workout detection for pool swimming, and impressive stroke accuracy. During my pool testing, it correctly counted every lap without any manual adjustment—a frustration point with many other watches that require you to tell them lap distance manually.
The larger case and display make it easier to see your interval times underwater, and the Action Button can be configured to mark intervals or split times without breaking your stroke rhythm. The water lock feature prevents accidental screen activation, and when you’re done, the built-in Depth app logs your swims with data about water temperature and depth.
For open water swimmers, the GPS tracking holds up well despite not having dedicated dual-frequency GPS. You’ll want to ensure a clear view of the sky, but most users find it accurate enough for lake and ocean swimming.
Best for Android Users: Samsung Galaxy Watch Ultra
Samsung’s Galaxy Watch Ultra ($699) is the company’s most capable fitness smartwatch yet, and it addresses many criticisms of previous Galaxy Watch models while maintaining the Android integration that made the lineup popular.
The new titanium frame and 47mm case provide durability without excessive weight, and the battery life has finally caught up to competitors—you’ll get through two full days of heavy use and into a third with light usage. The precision dual-frequency GPS delivers Apple-level accuracy, which was previously the Galaxy Watch’s weakest point.
Samsung’s Health app provides comprehensive fitness tracking, and the new AI-powered Energy Score gives you a daily readiness rating based on sleep, activity, and heart rate variability. The BioActive sensor tracks everything from body composition to blood oxygen, though some features require Samsung phones specifically.
The Galaxy Watch Ultra also works as a Samsung Galaxy Ring companion if you’ve invested in that ecosystem, creating a more holistic view of your daily activity and sleep.
Best for iOS Users (Non-Ultra): Apple Watch Series 10
The Apple Watch Series 10 ($399) is the best option for most iPhone users who don’t need Ultra-level ruggedness. It’s thinner and lighter than previous generations while featuring a larger display that makes reading workout metrics easier.
The new sleep apnea detection, approved by the FDA, adds genuine health value beyond fitness. The temperature sensing for cycle tracking has improved accuracy, and the depth sensor from the Ultra has trickled down, making this a solid choice for recreational swimmers.
Battery life remains the main compromise versus the Ultra—you’ll charge it daily rather than every few days. But for users who prefer a sleeker everyday watch that still handles workouts capably, the Series 10 delivers excellent value.
Best Budget Option: Fitbit Charge 6
At $159, the Fitbit Charge 6 isn’t technically a smartwatch—it’s a fitness tracker with some smartwatch features. But for many people, this is exactly what they need without overspending.
The Charge 6 offers reliable step counting, sleep tracking that consistently beats more expensive competitors, and 24/7 heart rate monitoring with surprisingly accurate readings during workouts. Google Maps integration provides turn-by-turn directions on your wrist, and YouTube Music controls add convenience for gym sessions.
The battery lasts about seven days, which means you charge it far less frequently than a full smartwatch. The trade-off is a smaller display without apps, but if your goal is fitness tracking without distraction, the simplicity is a feature.
For someone transitioning from no tracker to their first device, or for budget-conscious buyers who prioritize core fitness metrics over app ecosystems, the Charge 6 represents excellent value.
Comparison Table
| Model | Price | Battery Life | GPS | Water Rating | Best For |
|---|---|---|---|---|---|
| Apple Watch Ultra 2 | $799 | 36-72 hrs | Dual-band | 100m | Overall excellence |
| Garmin Forerunner 165 | $299 | 11-19 days | Multi-band | 5 ATM | Value seekers |
| Garmin Forerunner 965 | $599 | 23-31 days | Multi-band | 5 ATM | Serious runners |
| Samsung Galaxy Watch Ultra | $699 | 2-3 days | Dual-band | 100m | Android ecosystem |
| Apple Watch Series 10 | $399 | 18-36 hrs | GPS | 50m | iOS everyday users |
| Fitbit Charge 6 | $159 | ~7 days | GPS | 50m | Budget fitness |
Key Features to Consider Before Buying
Heart Rate Monitoring Technology
Optical heart rate sensors have improved dramatically, but accuracy still varies by brand and activity type. Chest straps remain the gold standard, but watches like the Apple Watch Ultra 2 and Garmin lineup get close enough for most training zones.
Look for devices with multi-band optical sensors and green plus red or infrared LEDs, which penetrate skin more effectively during intense movement.
GPS Accuracy and Type
If you run, cycle, or swim outdoors, GPS matters enormously. Single-frequency GPS can drift near buildings or under tree cover. Dual-frequency or multi-band GPS receives signals from multiple satellite constellations and frequencies, maintaining accuracy in challenging environments.
Garmin leads in GPS technology, but Apple and Samsung have closed the gap significantly with their latest releases.
Battery Life
This is where the math gets interesting. Apple Watch Ultra 2 lasts 36 hours typically, while a Garmin Forerunner can last weeks. But consider your actual usage—do you do multi-hour activities regularly, or is your longest workout 60 minutes?
Daily charging isn’t the end of the world if the experience otherwise satisfies you.
Sleep and Recovery Tracking
Beyond basic sleep stages, premium watches now offer recovery recommendations based on overnight heart rate variability, resting heart rate trends, and training load. Garmin and Whoop excel here, while Apple and Samsung are catching up quickly with their own insights.
Our Verdict
After months of testing across every major brand, the Apple Watch Ultra 2 remains the best overall fitness smartwatch for most people. It combines nearly unmatched athletic capabilities with the full smartwatch experience, making it worth the premium for users who want one device for everything.
“The best fitness watch is the one you’ll actually wear every day. The Ultra 2 succeeds because it doesn’t force you to choose between sports features and everyday functionality.”
Garmin’s Forerunner 165 delivers exceptional value for fitness-focused users who don’t need full smartwatch features, while the Forerunner 965 is the clear choice for dedicated runners willing to invest in performance optimization.
Android users should feel confident with the Samsung Galaxy Watch Ultra, which has finally closed the gap with Apple in both fitness tracking and everyday usability.
FAQs
What is the best smartwatch for fitness tracking in 2025?
The Apple Watch Ultra 2 ranks as the best overall for its combination of accurate sensors, comprehensive fitness features, and full smartwatch functionality. The Garmin Forerunner 165 offers the best value for fitness-focused users.
How do I choose a fitness smartwatch?
Start by identifying your primary activities and priorities. Runners should prioritize GPS accuracy and running-specific metrics. Swimmers need water resistance and lap counting. Casual users might prefer the smart features ecosystem. Set a budget, then find the best match for your specific needs.
Is Apple Watch or Garmin better for fitness?
It depends on your perspective. Apple offers a better overall smartwatch experience with solid fitness tracking. Garmin provides more advanced athletic features, better battery life, and superior GPS accuracy for serious athletes. Most casual users will be satisfied with either.
What smartwatch has the most accurate heart rate?
Garmin watches with Elevate V5 sensors (like the Forerunner 965 and Fenix 7) typically match chest strap accuracy most closely. Apple Watch Ultra 2 comes very close and is within 2-3 BPM of chest straps during most activities.
Do I need a fitness smartwatch or a fitness tracker?
If you want apps, maps, and smartphone notifications, choose a smartwatch. If you primarily care about steps, heart rate, sleep, and basic workout tracking, a fitness tracker like the Fitbit Charge 6 offers better battery life at a lower price.
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