Polar M400 vs. Casio WSD-F20A vs. Swatch Touch Zero One vs. Amazfit GTR
 | | | | |
| PolarM400Remove Buy Now | CasioWSD-F20ARemove Buy Now | SwatchTouch Zero OneRemove Buy Now | AmazfitGTRRemove Buy Now |
Basic Info | ||||
| Suggested Price | $200 | $399 | $220 | $199 |
| Release | 2014 | 2018 | 2015 | 2019 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | n/a | |||
| Oxygen | ||||
| Sleep | n/a | |||
| Steps | ||||
| Swim | n/a | |||
Battery | ||||
| Duration | 8 hours to 30 days | 1 day | n/a | 24 days |
| Rechargeable | ||||
Compatibility | ||||
| Android | n/a | |||
| iOS | n/a | |||
| Windows Phone | n/a | n/a | ||
| Mac | n/a | |||
| Windows | n/a | |||
Connectivity | ||||
| Bluetooth | ||||
| Cellular | ||||
| GPS | ||||
| NFC | ||||
| Wi-Fi | ||||
Display | ||||
| Color | ||||
| Resolution | n/a | 320 x 320 | n/a | 454 x 454 |
| Size | n/a | 1.32 inches | n/a | 1.39 inches |
| Touch | ||||
| Type | n/a | LCD | n/a | AMOLED |
Functions | ||||
| Audio Speaker | Alerts only | n/a | ||
| Clock | ||||
| Phone | n/a | |||
| Vibration | n/a | |||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | n/a | |||
| Ultraviolet Sensor | ||||
| Water Resistance | 3 ATM | 5 ATM | 5 ATM | |
Notifications | ||||
| Phone | n/a | |||
| Emails | n/a | |||
| Texts | n/a | |||
Software | ||||
| Operating System | n/a | Wear OS | n/a | Build-in |
| Apps | ||||
| Music | n/a | |||