Fitbit Ionic vs Amazfit GTR 3 Pro comparison
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| key specs |
| Display Size | 32mm | 36mm |
| Compatible OS | Android, iOS | Android, iOS |
| Strap Material | Elastomer | - |
| Ideal For | Unisex | Unisex |
| Strap Colour | - | Black |
| Dial Shape | - | Round |
| Display Type | - | AMOLED |
| general |
| Brand | Fitbit | Amazfit |
| Model | Ionic | GTR 3 Pro |
| Release date | August 1, 2017 | October 11, 2021 |
| Strap Material | Elastomer | - |
| Size | Regular | Regular |
| Touchscreen | Yes | Yes |
| Water Resistant | Yes | Yes |
| Water Resistance Depth | 50 metres | 5 ATM |
| Ideal For | Unisex | Unisex |
| Dial Shape | - | Round |
| Interchangeable Strap | - | Yes |
| Dial Material | - | Aluminium |
| Strap Colour | - | Black |
| Dial Colour | - | Black |
| dimensions |
| Weight (g) | 303.30 | 42.00 |
| Width | - | 46 |
| Height | - | 46 |
| Thickness | - | 10.7 |
| product details |
| Sensor | 3-axis Accelerometer, 3-axis Gyroscope, Optical Heart Rate Sensor, Altimeter, Ambient Light Sensor | Accelerometer Sensor, Barometer Sensor, Gyro Sensor, Light Sensor, Optical Heart Rate Sensor, SpO2 Sensor, Blood Pressure Monitor |
| Compatible Device | Android, iPhone | Android, iPhone |
| Notification | Yes | Yes |
| Notification Type | Vibration | - |
| Battery Type | Lithium Polymer | Li-ion |
| Charge Time | 120 minutes | - |
| Stand By Time | Upto 6 Days | - |
| Rechargeable Battery | Yes | - |
| Battery Life | - | 12 days |
| connectivity features |
| Bluetooth | Yes | Bluetooth |
| Wi-Fi | Yes | - |
| GPS | Yes | Yes |
| Other Connectivity Features | NFC | - |
| Bluetooth Version | - | 5.0 |
| Messaging Support | - | Yes |
| Third Party App Support | - | Yes |
| platform and storage features |
| Operating System | Fitbit OS | ZeppOS |
| Compatible Operating System | Android, iOS | Android, iOS |
| camera and display features |
| Display Resolution | 240x180 | 480x480 |
| Display Size | 32mm | 36mm |
| Display Type | - | AMOLED |
| Backlight Display | - | Yes |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Calendar | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Chronograph | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Number of Buttons | 3 | 2 |
| Altimeter | - | Yes |
| Compass | - | Yes |
| Language | - | English |
| Other Fitness Features | - | 150 sports mode |
| audio and video features |
| Speaker | - | Yes |
| Microphone | - | Yes |
| Voice Control | - | Yes |
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