Apple Watch vs. Casio WSD-F20A vs. Fitbit Flex vs. Polar Loop vs. Apple Watch Series 4
 | | | | | |
| AppleWatchRemove Buy Now | CasioWSD-F20ARemove Buy Now | FitbitFlexRemove Buy Now | PolarLoopRemove Buy Now | AppleWatch Series 4Remove Buy Now |
Basic Info | |||||
| Suggested Price | $349 | $399 | $100 | $100 | $329 |
| Release | 2015 | 2018 | 2013 | 2013 | 2018 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | |||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 18 hours | 1 day | 5 days | 5 days | Not Yet |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | NA | NA | NA | ||
| Mac | NA | NA | |||
| Windows | NA | NA | |||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | 340 x 272 or 390 x 312 | 320 x 320 | NA | NA | 384 x 480 |
| Size | 1.5 inches or 1.65 inches | 1.32 inches | NA | NA | 1.78 inches |
| Touch | NA | ||||
| Type | AMOLED | LCD | LED | LED | MicroLED |
Functions | |||||
| Audio Speaker | |||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | IPX7 | 5 ATM | 1 ATM | 2 ATM | Not Yet |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | Watch OS | Wear OS | NA | NA | Watch OS 5 |
| Apps | |||||
| Music | |||||