How to choose a fitness smartwatch
Unlike a simple band, a smartwatch is a small computer on your wrist — which means your phone, your battery tolerance and your sensors matter more than the step count.
Your phone comes first
This is the single biggest filter. The Apple Watch SE only works with an iPhone. The Pixel Watch 3 and Samsung Galaxy Watch 7 are Android-first, and the Galaxy’s ECG needs a paired Samsung phone. Garmin’s Forerunner 165 is the neutral option that works well with either. Buy the watch that matches the phone in your pocket.
Battery: a day or a week?
Full smartwatches from Apple, Samsung and Google last roughly a day, so they charge nightly and can miss sleep tracking if you forget. Garmin and Amazfit stretch to one to two weeks. If overnight data or fewer charges matter, weight your choice toward battery life.
Sensors and honest health claims
Match the sensors to what you will actually use. Only some of these do ECG — the Samsung Galaxy Watch 7 and Google Pixel Watch 3 — while the Apple Watch SE and Amazfit GTR 4 do not. Even where present, wrist ECG, SpO2 and sleep readings are wellness features, not medical diagnostics. If heart monitoring is your priority, see our best health-monitoring wearables.
Training depth vs smart features
Decide what the watch is for. Garmin leans toward training — structured workouts, recovery and running metrics. Apple, Samsung and Google lean toward smart features — apps, calls, payments and notifications — with capable but less specialized fitness tools. Our Apple Watch vs Garmin comparison digs into that split, and if you want the slim-band alternative, start with the best fitness trackers.
