In depth comparison and review of Xiaomi Watch S1 Active and Fitbit Sense 2. Compare sizes, functions, displays, batteries and other important specifications and features to easily choose the right smartwatch for you. Our goal is to help you uncover differences between the products and find the watch that will best fit your needs.
| GENERAL | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Supported Host Device OS | iOS 10 or later, Android 6.0 (Marshmallow) or later | Android 8.0 (Oreo) or later, iOS 14 or later |
| Activity/Sport | Multisport | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | Microphone | Microphone |
| Audio Output | Speaker | Speaker |
| Width | - | 40.5 mm |
| Height | - | 40.5 mm |
| Depth | - | 12.3 mm |
| Body Details | Case only: 36.3 g | - |
| Body Material | Glass fibre reinforced polyamide | Aluminium |
| Protection | Water-resistant | Water-resistant |
| Colours | Ocean blue | Moon white | - |
| Clock Display | Yes | Yes |
| FEATURES | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Sensors | Accelerometer, ambient light sensor, barometer, SpO2 sensor, geomagnetic sensor, optical heart sensor, PPG sensor, gyroscope | Ambient light sensor, altimeter, SpO2 sensor, 3-axis accelerometer, temperature, optical heart sensor, electrodermal activity (EDA) sensor, vibration motor, multipurpose electrical sensor |
|---|---|---|
| Tracking Data | Distance, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, stress level | Distance, calories burned, activity, sleep activity, heart rate, steps taken, floors climbed, blood oxygen saturation, stress level, active time, menstrual cycle, breathing rate, temperature, sleep quality score, blood glucose |
| Modes | 117 fitness modes, 19 professional modes | 40+ sports modes |
| Goal Setting | Yes | Yes |
| Features | Call handling, find phone function, flashlight, automatic exercise recognition, breathing training function, music playback control, weather information, customisable watch faces, Health index, Women's health | Find phone function, automatic exercise recognition, breathing training function, Active Zone Minutes, HRV index, Sleep Score, Sleep Profile, Stress Management Score, Daily Readiness Score, all day body response tracking, cardio fitness score |
| Notifications | SMS, Email, social apps, incoming calls | SMS, applications, high and low heart rate, calls, irregular rhythm |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Vibration alert, visual interface | Vibration alert, visual interface |
| Navigation (GPS) | GPS/GLONASS/Galileo/BeiDou/QZSS receiver | GPS/GLONASS receiver |
| Payment Technology | - | FitBit Pay |
| Internet of Things (IoT) Compatible | Yes | Yes |
| IoT Intelligent Assistant | Alexa built-in | Alexa built-in |
| IoT Voice Controlled | Direct | Direct |
| CONNECTIVITY | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Wireless Interface | IEEE 802.11b/g/n, NFC, Bluetooth 5.2 | NFC, Bluetooth 5.0 |
|---|
| DISPLAY | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Type | AMOLED - colour | Colour |
|---|---|---|
| Resolution | 466 x 466 pixels | - |
| Screen Size | 1.43" | - |
| Pixel Density | 326 ppi | - |
| Always On Display (AOD) | Yes | Yes |
| INPUT DEVICE | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Type | Touch sensitive screen, push buttons | Touch sensitive screen, push button |
|---|
| CASE | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Case Shape | Round | Square |
|---|---|---|
| Bezel | Metal | - |
| Case Back | - | Aluminium |
| Case Details | Blue | Silver | Space black | Platinum aluminum |
| BAND | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Band Type | Strap | Band |
|---|---|---|
| Band Size | - | S |
| Fits Wrist with Circumference | 160-220 mm | 129-175 mm |
| Changeable | Yes | Yes |
| Clasp Type | Buckle | Pin-and-tuck |
| Band Material | TPU | - |
| Band Colour | Blue | White | Black | Lunar white |
| BATTERY | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Technology | - | Lithium polymer |
|---|---|---|
| Capacity | 470 mAh | - |
| Battery Life | 12 day(s) | 6 day(s) |
| Battery Life Details | Typical usage - up to 12 days Power saving mode - up to 24 days GPS mode - up to 30 hour(s) |
GPS mode - up to 5 hour(s) |
| Rechargeable Battery | Yes | - |
| Recharge Time | 2.5 hour(s) | 2 hours |
| MISCELLANEOUS | Xiaomi Watch S1 Active | Fitbit Sense 2 |
|---|
| Included Accessories | Magnetic charging cable | Charging cable, 6-month Fitbit Premium membership, wristband (158 - 209 mm) |
|---|---|---|
| Preloaded Software | - | Alarm, FitBit Pay |
| Compliant Standards | GB/T 30106-2013 | - |
| Max Depth of Water Resistance | 50 m | 50 m |
| Max Operating Temperature | 45 °C | 45 °C |
| Min Operating Temperature | -10 °C | -10 °C |
| Warranty | 2-year warranty | 2-year warranty |
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