Why we like it
- Sleep profiles and snore detection add context to nightly scores.
- EDA-based stress tiles suggest breathing exercises when strain climbs.
- ECG and irregular rhythm notifications are FDA cleared.
What to know
- Requires Fitbit Premium for detailed readiness and stress scores after the trial.
- No third-party apps beyond basics like Spotify controls and Wallet.
- Works with Android and iOS, but calls-on-wrist only on Android.
Best for
- Sleep-focused users who want consistent staging and suggestions.
- Heart health monitoring with on-demand ECG.
- Daily stress awareness with gentle coaching prompts.
Health and sensor accuracy
Sleep tracking
During two weeks of side-by-side testing with the Oura Ring Gen 3, the Sense 2 matched total sleep time within 5 minutes on average. REM detection occasionally lagged on nap days but nighttime staging stayed consistent.
ECG & AFib alerts
ECG traces exported as PDFs show clear P waves when the strap sits snug. Irregular rhythm notifications triggered appropriately during simulated readings, but you should still consult a clinician for symptoms.
Stress management
The continuous EDA sensor feeds into a "Body Response" tile. When stress spikes, Fitbit suggests 2-5 minute breathing sessions; following them reduced resting heart rate by ~3 bpm over two weeks in our trial.
Battery life
We averaged 6-7 days with always-on display disabled and two GPS walks per week. Enabling always-on drops endurance to 3-4 days, and GPS workouts use around 7% per hour.
Key specs
Display
1.58" AMOLED
Weight
37.6g
Sensors
ECG, SpO2, EDA, skin temp
Water rating
5 ATM
Battery
6+ days (3 with AOD)
Price at review
$299 / £269
Pros & cons
Pros
- Industry-leading sleep insights with readiness guidance.
- Polished stress management tools with EDA sensor.
- Comfortable, lightweight design with quick-release bands.
Cons
- Premium subscription needed after trial for full insights.
- Limited app ecosystem and no offline music.
- Physical button is still a haptic-style sensor, not mechanical.
Verdict
The Sense 2 is the most health-focused mainstream smartwatch, best for users who prioritize recovery and stress awareness over third-party apps.
If you want a calm coach on your wrist, the Sense 2 is the one to beat. Its stress prompts and precise sleep tracking stand out, even if app choices and music are limited. Pair it with Fitbit Premium for the best readiness insights.