Fitbit Flex 2 vs. Fitbit One vs. Apple Watch vs. Amazfit GTR vs. HTC re Grip
 | | | | | |
| FitbitFlex 2Remove Buy Now | FitbitOneRemove Buy Now | AppleWatchRemove Buy Now | AmazfitGTRRemove Buy Now | HTCre GripRemove Buy Now |
Basic Info | |||||
| Suggested Price | $100 | $100 | $349 | $199 | $199 |
| Release | 2016 | 2012 | 2015 | 2019 | 2020 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | |||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 5 days | 10-14 days | 18 hours | 24 days | 5 hours to 2.5 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | n/a | NA | NA | |
| Mac | NA | NA | |||
| Windows | NA | NA | |||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | n/a | ||||
| Resolution | n/a | n/a | 340 x 272 or 390 x 312 | 454 x 454 | 160 x 32 |
| Size | n/a | n/a | 1.5 inches or 1.65 inches | 1.39 inches | 1.8 inches |
| Touch | n/a | ||||
| Type | LED | OLED | AMOLED | AMOLED | PMOLED |
Functions | |||||
| Audio Speaker | |||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 5 ATM | Splast Resistant | IPX7 | 5 ATM | IP57 |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | n/a | Watch OS | Build-in | NA |
| Apps | |||||
| Music | |||||