How to Choose a Smartwatch or Fitness Tracker: Buying Guide
Wearables range from simple step counters to GPS running watches with dozens of sensors. Picking the right one comes down to matching the feature set to what you'll actually use day to day, not the longest spec sheet.
What to look for
Built-in GPS vs. connected GPS
Built-in GPS tracks distance and pace without needing your phone nearby, useful for runs where you don't want to carry a phone. Connected GPS relies on your phone's location, which works fine if you always run with your phone.
Battery life
Smartwatches with bright always-on displays and GPS tend to last 1-2 days per charge; simpler fitness trackers with basic displays can last a week or more. Decide how often you're willing to charge before choosing.
Phone compatibility
Some smartwatches only work fully with iPhone or only with Android, while others are cross-compatible with reduced features on one platform. Check compatibility with your specific phone before buying.
Health sensors
Heart rate is standard on nearly all wearables now. Blood oxygen (SpO2), ECG, and skin temperature sensors add cost and are found mostly on higher-end models — useful if you specifically want to track those metrics.
Common types
- GPS running watches: Built for tracking pace, distance, and training metrics; often chunkier than everyday smartwatches.
- Everyday smartwatches: Balance notifications, apps, and fitness tracking in one device, closer to a small phone on your wrist.
- Simple fitness trackers: Slimmer and longer battery life, with fewer smartwatch features like apps or voice assistants.
- Smart rings: Discreet, multi-day battery life, but limited to sleep and recovery tracking with no screen for notifications.
Ready to compare specific models? See our Wearables & Health catalog or jump straight to our best Wearables & Health picks for 2026.
Frequently asked questions
Do I need built-in GPS?
Only if you want to leave your phone at home during workouts. Otherwise connected GPS through your phone works just as well for tracking routes.
Will a smartwatch work with any phone?
Not always — check the manufacturer's compatibility list for your exact phone model and operating system before buying.
Are health sensors like SpO2 or ECG medically accurate?
They're generally marketed as fitness and wellness tools, not medical devices, so treat readings as general trends rather than diagnostic data.