Casio WSD-F20A vs. Fitbit Flex vs. Polar A370 vs. Garmin Vivosmart 4 vs. Apple SE
 | | | | | |
| CasioWSD-F20ARemove Buy Now | FitbitFlexRemove Buy Now | PolarA370Remove Buy Now | GarminVivosmart 4Remove Buy Now | AppleSERemove Buy Now |
Basic Info | |||||
| Suggested Price | $399 | $100 | $179.95 | $130 | $279 |
| Release | 2018 | 2013 | 2017 | 2018 | 2020 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | |||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 1 day | 5 days | Up to 3 days | 7 days | 18 hours |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | NA | ||||
| Mac | |||||
| Windows | |||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | 320 x 320 | NA | 160 x 80 | 48 x 128 | 384 x 480 |
| Size | 1.32 inches | NA | 1.18 inches | 0.74 inches | 40mm |
| Touch | NA | ||||
| Type | LCD | LED | TFT LCD | OLED | MicroLED |
Functions | |||||
| Audio Speaker | |||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | Not yet | ||||
| Water Resistance | 5 ATM | 1 ATM | WR30 | 5 ATM | |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | Wear OS | NA | WatchOS 5 | ||
| Apps | |||||
| Music | |||||