Fitbit Flex vs. Polar Loop vs. Amazfit T-Rex
 | | | |
| FitbitFlexRemove Buy Now | PolarLoopRemove Buy Now | AmazfitT-RexRemove Buy Now |
Basic Info | |||
| Suggested Price | $100 | $100 | $140 |
| Release | 2013 | 2013 | 2019 |
Activity & Fitness | |||
| Calories | |||
| Cycling (Bicycling) | |||
| Distance | |||
| Heart | |||
| Oxygen | |||
| Sleep | |||
| Steps | |||
| Swim | |||
Battery | |||
| Duration | 5 days | 5 days | 20 days |
| Rechargeable | |||
Compatibility | |||
| Android | |||
| iOS | |||
| Windows Phone | NA | NA | |
| Mac | NA | ||
| Windows | NA | ||
Connectivity | |||
| Bluetooth | |||
| Cellular | |||
| GPS | |||
| NFC | |||
| Wi-Fi | |||
Display | |||
| Color | |||
| Resolution | NA | NA | 360 x 360 |
| Size | NA | NA | 1.3 inches |
| Touch | NA | ||
| Type | LED | LED | AMOLED |
Functions | |||
| Audio Speaker | |||
| Clock | |||
| Phone | |||
| Vibration | |||
| Voice | |||
Hardware | |||
| Accelerometer | |||
| Barometer or Altimeter | |||
| Ultraviolet Sensor | |||
| Water Resistance | 1 ATM | 2 ATM | 5 ATM |
Notifications | |||
| Phone | |||
| Emails | |||
| Texts | |||
Software | |||
| Operating System | NA | NA | Build-in |
| Apps | |||
| Music | |||