Side by side comparison and review of Apple Watch Series 4 (GPS + Cellular) and Fitbit Sense 2. Compare design, displays, functions, batteries and other key specifications and features to simplify the choice of your perfect smartwatch. Our goal is to make it easier for you to decide on the watch that will best meet your expectations by revealing the main differences between the products.
| GENERAL | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | WatchOS 5 | - |
| Supported Host Device OS | iOS | Android 8.0 (Oreo) or later, iOS 14 or later |
| Activity/Sport | - | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | Microphone | Microphone |
| Audio Output | Speaker | Speaker |
| Width | 34 mm | 40.5 mm |
| Height | 40 mm | 40.5 mm |
| Depth | 10.7 mm | 12.3 mm |
| Weight | 39.8 g | - |
| Body Material | Stainless steel | Aluminium |
| Protection | Waterproof | Water-resistant |
| Clock Display | Yes | Yes |
| FEATURES | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Sensors | Accelerometer, ambient light sensor, gyro sensor, barometric altimeter, optical heart sensor, electrical heart sensor | 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, time, calories burned, activity, heart rate, steps taken, UV index, Air Quality index | 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 | - | 40+ sports modes |
| Goal Setting | Yes | Yes |
| Features | Music remote handling, ECG accurate heart rate, listening to music, Retina Display technology, call alerts, automatic exercise recognition, Fall detection, Emergency SOS | 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 | Calendar, SMS, Email | SMS, applications, high and low heart rate, calls, irregular rhythm |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Audio alert, vibration alert, visual interface | Vibration alert, visual interface |
| Navigation (GPS) | GPS/GLONASS/Galileo/QZSS receiver | GPS/GLONASS receiver |
| Payment Technology | Apple Pay | FitBit Pay |
| Internet of Things (IoT) Compatible | - | Yes |
| IoT Intelligent Assistant | Siri | Alexa built-in |
| IoT Voice Controlled | - | Direct |
| CELLULAR | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Technology | WCDMA (UMTS) / GSM | - |
|---|---|---|
| Mobile Broadband Generation | 4G | - |
| SIM Card Type | Electronic SIM card (e-SIM) | - |
| Messaging Services | SMS | - |
| Supported Mobile Messaging Services | SMS | - |
| CONNECTIVITY | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Wireless Interface | IEEE 802.11b/g/n, Bluetooth 5.0 | NFC, Bluetooth 5.0 |
|---|
| DISPLAY | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Type | LTPO OLED - colour | Colour |
|---|---|---|
| Resolution | 324 x 394 pixels | - |
| Screen Size | 1.57" | - |
| Screen Protection | Sapphire glass | - |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Type | Touch sensitive screen (Force Touch) | Touch sensitive screen, push button |
|---|
| CASE | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Case Size | 40 mm | - |
|---|---|---|
| Case Shape | Rectangular | Square |
| Case Back | Sapphire crystal and ceramic back | Aluminium |
| Case Details | Stainless steel | Space grey aluminium | Space black stainless steel | Silver aluminium | Gold aluminium | Gold stainless steel | Platinum aluminum |
| Crown Type | Digital with haptic feedback | - |
| BAND | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Band Type | Milanese loop | Band |
|---|---|---|
| Band Size | - | S |
| Fits Wrist with Circumference | 130-180 mm | 129-175 mm |
| Changeable | - | Yes |
| Clasp Type | Magnetic closure | Pin-and-tuck |
| Band Material | Steel mesh | - |
| Band Colour | White | Black | Pink sand | Space black | Gold | Seashell | Stone | Lunar white |
| STORAGE | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Storage Capacity | 16 GB | - |
|---|
| CPU | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Manufacturer | Apple | - |
|---|---|---|
| CPU Type | S4 | - |
| Features | W3 Apple wireless chip | - |
| BATTERY | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Technology | Lithium Ion | Lithium polymer |
|---|---|---|
| Battery Life | 18 hours | 6 day(s) |
| Battery Life Details | - | GPS mode - up to 5 hour(s) |
| Rechargeable Battery | Yes | - |
| Recharge Time | - | 2 hours |
| Wireless Charging | Yes | - |
| MISCELLANEOUS | Apple Watch Series 4 (GPS + Cellular) | Fitbit Sense 2 |
|---|
| Included Accessories | Power adapter, magnetic charging cable | Charging cable, 6-month Fitbit Premium membership, wristband (158 - 209 mm) |
|---|---|---|
| Preloaded Software | Apple Pay | Alarm, FitBit Pay |
| SAR Value | 0.27 W/kg (head), 0.26 W/kg (limb) | - |
| Max Depth of Water Resistance | 50 m | 50 m |
| Max Operating Temperature | - | 45 °C |
| Min Operating Temperature | - | -10 °C |
| Warranty | - | 2-year warranty |
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