| Battery | Up to 7 days (Fitbit estimate, default settings) | Up to 10 days typical use, up to 19 days in battery saver mode, up to 5 days heavy use, up to 21 hours continuous GPS, 260 mAh (rated), magnetic charging base, about 2 hours to charge |
|---|
| Sensors | Heart rate with machine-learning algorithm (up to 60% more accurate than Charge 5 in HIIT, spinning and rowing per Fitbit), ECG app (select countries), EDA stress scan, SpO2, heart rate variability, breathing rate | BioTracker 6.0 PPG heart-rate sensor, accelerometer, gyroscope, ambient light sensor, geomagnetic sensor, temperature sensor, barometric altimeter |
|---|
| Navigation | Built-in GPS; Google Maps turn-by-turn directions | — |
|---|
| Features | Google Wallet contactless payments, YouTube Music controls (Premium subscription), 40+ exercise modes, heart rate broadcast to compatible gym equipment over encrypted Bluetooth, Zoom + Magnification accessibility feature | — |
|---|
| Controls | Haptic side button | — |
|---|
| Compatibility | Android 9.0 or newer, iOS 15 or newer, Google Account required | Android 7.0 and above, iOS 15.0 and above, via the Zepp App |
|---|
| Subscription | 6 months of Fitbit Premium included with device | — |
|---|
| Colors | Obsidian, Porcelain, Coral | — |
|---|
| Display | — | 1.75-inch AMOLED, 390 x 450 pixels (341 ppi), sapphire glass, up to 2,000 nits peak brightness |
|---|
| Case | — | Square case, stainless-steel bezel with fiber-reinforced polymer body, 43.32 x 36.9 x 9 mm, 2 buttons |
|---|
| Weight | — | 31.4 g (without strap) |
|---|
| Strap | — | 20 mm leather strap with pin buckle (150-210 mm) plus an additional red silicone sport strap (135-195 mm) in the box |
|---|
| Positioning | — | 5 satellite positioning systems with circularly polarised antenna, offline maps with turn-by-turn directions |
|---|
| Water Resistance | — | 5 ATM |
|---|
| Connectivity | — | Bluetooth 5.2 (BLE) |
|---|
| Audio | — | Built-in microphone and speaker |
|---|
| Sports Modes | — | 160+ sports modes including HYROX race mode, strength-training recognition of 25 movements and 8 sports movements |
|---|
| Health Tracking | — | 24-hour heart rate, blood-oxygen, stress and skin temperature, sleep stages and breathing quality, Readiness score, HRV, PAI, menstrual cycle tracking |
|---|
| Smart Features | — | Zepp Flow voice assistant (select regions), Zepp Coach, Bluetooth music control, call and app notifications, Android quick replies |
|---|
| In the Box | — | Amazfit Active 2 Square with black leather strap, additional red silicone strap, magnetic charging base (no USB-C cable), instruction manual |
|---|
