In depth comparison and review of Fitbit Sense 2 and Amazfit GTS 4. 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 | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | - | Zepp OS |
| Supported Host Device OS | Android 8.0 (Oreo) or later, iOS 14 or later | iOS 12 or later, Android 7.0 (Nougat) or later |
| Activity/Sport | Multisport | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | Microphone | Microphone |
| Audio Output | Speaker | Speaker |
| Width | 40.5 mm | 36.5 mm |
| Height | 40.5 mm | 42.7 mm |
| Depth | 12.3 mm | 9.9 mm |
| Weight | - | 27 g |
| Body Material | Aluminium | Stainless steel, aluminium alloy frame |
| Protection | Water-resistant | Water-resistant |
| Clock Display | Yes | Yes |
| FEATURES | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Sensors | Ambient light sensor, altimeter, SpO2 sensor, 3-axis accelerometer, temperature, optical heart sensor, electrodermal activity (EDA) sensor, vibration motor, multipurpose electrical sensor | Accelerometer, ambient light sensor, geomagnetic sensor, barometric altimeter, gyroscope, BioTracker PPG 4.0 biometric sensor |
|---|---|---|
| Tracking Data | 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 | Time, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, sleep stages, stress level, menstrual cycle, personal activity intelligence (PAI), recovery time, training load, sleep quality score, nap, sleep breathing quality |
| Modes | 40+ sports modes | 154 sports modes |
| Goal Setting | Yes | Yes |
| Features | 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 | Strength training guidance, camera remote control, find phone function, answering a call, VO2 max, making a call, Find my Device, breathing training function, store & play music, sunrise/sunset times, auto pause, auto lap, realtime location tracking, music playback control, weather information, instant message reply, PeakBeats workout status algorithm, ExerSense algorithm, Dual-band navigation, linear motor, Virtual Pacer, track run mode, smart trajectory correction, route file import |
| Notifications | SMS, applications, high and low heart rate, calls, irregular rhythm | SMS, incoming calls, applications, high and low heart rate, low blood-oxygen, high stress level |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Vibration alert, visual interface | Audio alert, vibration alert, visual interface |
| Navigation (GPS) | 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 | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Wireless Interface | NFC, Bluetooth 5.0 | Wi-Fi, Bluetooth 5.0 |
|---|
| DISPLAY | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Type | Colour | AMOLED - colour |
|---|---|---|
| Resolution | - | 390 x 450 pixels |
| Screen Size | - | 1.75" |
| Pixel Density | - | 341 ppi |
| Screen Protection | - | Tempered glass |
| Always On Display (AOD) | Yes | Yes |
| INPUT DEVICE | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Type | Touch sensitive screen, push button | Touch sensitive screen, push button |
|---|
| CASE | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Case Shape | Square | Rectangular |
|---|---|---|
| Case Back | Aluminium | - |
| Case Details | Platinum aluminum | Aluminium alloy |
| BAND | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Band Type | Band | Strap |
|---|---|---|
| Band Size | S | - |
| Band Width | - | 20 mm |
| Fits Wrist with Circumference | 129-175 mm | 140-200 mm |
| Changeable | Yes | Yes |
| Clasp Type | Pin-and-tuck | Pin buckle |
| Band Material | - | Fluoroelastomer |
| Band Colour | Lunar white | Infinite black | Misty white | Rosebud pink |
| STORAGE | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| User Memory | - | 2.3 GB |
|---|
| BATTERY | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Technology | Lithium polymer | - |
|---|---|---|
| Capacity | - | 300 mAh |
| Battery Life | 6 day(s) | - |
| Battery Life Details | GPS mode - up to 5 hour(s) | Typical usage - up to 8 days Battery Saver Watch Mode - up to 16 days Clock - up to 30 days Heavy usage - up to 4 days Accurate mode (with GPS) - up to 16 hours GPS mode - up to 28 hours Power saving mode (with GPS) - up to 33 hours |
| Rechargeable Battery | - | Yes |
| Recharge Time | 2 hours | 2 hour(s) |
| MISCELLANEOUS | Fitbit Sense 2 | Amazfit GTS 4 |
|---|
| Included Accessories | Charging cable, 6-month Fitbit Premium membership, wristband (158 - 209 mm) | Magnetic charging cable |
|---|---|---|
| Preloaded Software | Alarm, FitBit Pay | To Do List, Games, Stopwatch, Calendar, World clock, Alarm Clock, Reminders, Timer, Compass, Countdown timer |
| Max Depth of Water Resistance | 50 m | 50 m |
| Max Operating Temperature | 45 °C | 45 °C |
| Min Operating Temperature | -10 °C | 0 °C |
| Warranty | 2-year warranty | 1-year warranty |
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