Xiaomi Watch S4 vs Fitbit Charge 6
Compare specifications, current prices and availability. Choose up to four products from the same family.
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Xiaomi Watch S4 |  Fitbit Charge 6 |
|---|---|---|
| Price | KSh 20,000.00 | KSh 20,000.00 |
| Display | 1.43-inch AMOLED, 60 Hz | AMOLED |
| Battery capacity | 486 mAh | — |
| Water resistance | 5 ATM rated for suitable shallow-water activities | 5 ATM / water resistant to 50 m; intended for suitable shallow-water use |
| Operating system | Xiaomi HyperOS 2 | — |
| Positioning / GNSS | Built-in GPS, Galileo, GLONASS, BeiDou and QZSS | — |
| Health & wellness features | Heart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis | Heart rate, blood oxygen, skin-temperature variation, ECG-compatible and EDA stress features; availability varies and wellness features are not medical diagnosis |
Full specifications
2 of 4 products
| Specification | Xiaomi Watch S4 | Fitbit Charge 6 |
|---|---|---|
| Identity & design | ||
| Brand | Xiaomi | Fitbit |
| Model | Xiaomi Watch S4 | Fitbit Charge 6 |
| Announced | March 2025 (global model) | September 2023 |
| Dimensions | 47.3 × 47.3 × 12.0 mm (strap and protrusions excluded) | 36.73 × 23.09 × 11.20 mm |
| Weight | Approximately 44.5 g (strap excluded) | 30 g |
| Build materials | Aluminum-alloy frame with interchangeable bezel | Aluminum case, Corning Gorilla Glass 3, and flexible silicone infinity band |
| Wrist size | Black/Silver: approximately 140–210 mm; Rainbow: approximately 135–210 mm | Small: 130–170 mm; large: 170–210 mm; both sizes included |
| Strap / band | Fluororubber; Rainbow configuration also includes nylon strap | Flexible silicone infinity band with loop-and-peg closure |
| Controls / buttons | Rotating crown, side control, interchangeable bezel interaction, and touchscreen | Haptic side button and AMOLED touchscreen |
| Display | ||
| Display | 1.43-inch AMOLED, 60 Hz | AMOLED |
| Screen resolution | 466 × 466 pixels (~326 ppi) | — |
| Display protection | — | Corning Gorilla Glass 3 |
| Display features | Always-on display; up to 1,500 nits HBM | Always-on display supported; increases power use |
| Performance & software | ||
| Operating system | Xiaomi HyperOS 2 | — |
| Connectivity | ||
| Bluetooth | Bluetooth 5.3 | Bluetooth Low Energy |
| NFC | Supported; availability varies by region | Built-in NFC; supported payment features vary by country and bank |
| Positioning / GNSS | Built-in GPS, Galileo, GLONASS, BeiDou and QZSS | — |
| Audio & communication | ||
| Speaker | Built-in speaker | — |
| Microphone | Two built-in microphones | — |
| Calling | Bluetooth calling when paired with a compatible phone; third-party app voice calls not supported | — |
| Sensors, health & fitness | ||
| Sensors | Heart-rate/blood-oxygen sensor, accelerometer, gyroscope, ambient-light sensor, electronic compass, barometer and Hall sensor | Optical heart-rate monitor, 3-axis accelerometer, red/infrared SpO2 sensors, device temperature sensor, ambient-light sensor, multipurpose ECG/EDA electrical sensors, vibration motor, GPS and GLONASS |
| Health & wellness features | Heart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis | Heart rate, blood oxygen, skin-temperature variation, ECG-compatible and EDA stress features; availability varies and wellness features are not medical diagnosis |
| Sleep tracking | Sleep monitoring supported | Sleep stages, sleep score and overnight wellness tracking |
| Sports / workout modes | More than 150 sports modes | Multiple exercise modes with built-in GPS |
| Battery & durability | ||
| Battery capacity | 486 mAh | — |
| Battery life | Up to 15 days typical use; actual life varies by settings and use | Up to 7 days; always-on display and SpO2 use require more frequent charging |
| Charging | 2-pin magnetic charging dock | Proprietary charging cable; approximately 2 hours from 0–100% |
| Water resistance | 5 ATM rated for suitable shallow-water activities | 5 ATM / water resistant to 50 m; intended for suitable shallow-water use |
| Compatibility | ||
| Phone compatibility | Android 8.0 or later; iOS 14.0 or later | Android 11.0 or later; iOS 16.4 or later; Bluetooth LE and internet required |
| Companion app | Mi Fitness | Google Health app |
| Colors | Black, Silver, or Rainbow depending on configuration | Coral / Champagne Gold Aluminum; Porcelain / Silver Aluminum; Obsidian / Black Aluminum |
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