| Battery | Up to 7 days (Fitbit estimate, default settings) | Up to 25 days (typical use), up to 13 days (heavy use), up to 10 days with always-on display; up to 64 hours of continuous GPS; 658 mAh |
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| 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 PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope, geomagnetic, barometric altimeter, ambient light, temperature |
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| Navigation | Built-in GPS; Google Maps turn-by-turn directions | — |
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| 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 | — |
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| Controls | Haptic side button | — |
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| Compatibility | Android 9.0 or newer, iOS 15 or newer, Google Account required | — |
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| Subscription | 6 months of Fitbit Premium included with device | — |
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| Colors | Obsidian, Porcelain, Coral | — |
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| Display | — | 1.5-inch AMOLED, 480x480, 323 ppi, up to 3,000 nits peak, strengthened glass with anti-fingerprint coating |
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| Body | — | Aluminum alloy frame, polymer case; 48.5 x 48.5 x 12.2 mm, 39.5 g without strap; 22 mm silicone strap; two buttons |
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| Positioning | — | Five satellite positioning systems; free downloadable offline maps, including ski resort maps |
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| Connectivity | — | Bluetooth LE 5.3, Bluetooth calls, microphone and speaker |
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| Durability | — | 5 ATM water resistance (ISO 22810:2010) |
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| Storage | — | 4GB onboard |
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| Sports | — | 170+ sport modes, automatic recognition of 25 strength exercises, HYROX tools, HybridCharge energy intelligence |
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| OS | — | Zepp OS (release notes list an upgrade to Zepp OS 6); Zepp App for Android 7.0+ and iOS 14.0+ |
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