Casio WSD-F20A vs. Fitbit Charge HR vs. Amazfit GTR vs. Apple Series 6
 | | | | |
| CasioWSD-F20ARemove Buy Now | FitbitCharge HRRemove Buy Now | AmazfitGTRRemove Buy Now | AppleSeries 6Remove Buy Now |
Basic Info | |||||
| Suggested Price | $399 | $150 | $199 | $399 | |
| Release | 2018 | 2015 | 2019 | 2020 | |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | |||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 1 day | 5 days | 24 days | Not yet | |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | NA | ||||
| Mac | |||||
| Windows | |||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | 320 x 320 | NA | 454 x 454 | 384 x 480 | |
| Size | 1.32 inches | NA | 1.39 inches | 40mm | |
| Touch | NA | ||||
| Type | LCD | OLED | AMOLED | MicroLED | |
Functions | |||||
| Audio Speaker | |||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | 5 ATM | ||||
| Water Resistance | 5 ATM | 1 ATM | 5 ATM | ||
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | Wear OS | NA | Build-in | WatchOS 5 | |
| Apps | |||||
| Music | |||||