Fitbit Charge vs. Fitbit Flex vs. Polar A370 vs. Amazfit GTS
 | | | | |
| FitbitChargeRemove Buy Now | FitbitFlexRemove Buy Now | PolarA370Remove Buy Now | AmazfitGTSRemove Buy Now |
Basic Info | ||||
| Suggested Price | $130 | $100 | $179.95 | $150 |
| Release | 2014 | 2013 | 2017 | 2019 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | ||||
| Oxygen | ||||
| Sleep | ||||
| Steps | ||||
| Swim | ||||
Battery | ||||
| Duration | 7-10 days | 5 days | Up to 3 days | 14 days |
| Rechargeable | ||||
Compatibility | ||||
| Android | ||||
| iOS | ||||
| Windows Phone | NA | NA | ||
| Mac | ||||
| Windows | ||||
Connectivity | ||||
| Bluetooth | ||||
| Cellular | ||||
| GPS | ||||
| NFC | ||||
| Wi-Fi | ||||
Display | ||||
| Color | ||||
| Resolution | NA | NA | 160 x 80 | 348 x 442 |
| Size | NA | NA | 1.18 inches | 1.65 inches |
| Touch | NA | NA | ||
| Type | OLED | LED | TFT LCD | AMOLED |
Functions | ||||
| Audio Speaker | ||||
| Clock | ||||
| Phone | ||||
| Vibration | ||||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | ||||
| Ultraviolet Sensor | ||||
| Water Resistance | 1 ATM | 1 ATM | WR30 | 5 ATM |
Notifications | ||||
| Phone | ||||
| Emails | ||||
| Texts | ||||
Software | ||||
| Operating System | NA | NA | Wear OS | |
| Apps | ||||
| Music | ||||