Fitbit Alta vs. Casio WSD-F20A vs. Fitbit Charge vs. Fitbit Flex vs. Polar A370
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| FitbitAltaRemove Buy Now | CasioWSD-F20ARemove Buy Now | FitbitChargeRemove Buy Now | FitbitFlexRemove Buy Now | PolarA370Remove Buy Now |
Basic Info | |||||
| Suggested Price | $130 | $399 | $130 | $100 | $179.95 |
| Release | 2016 | 2018 | 2014 | 2013 | 2017 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | |||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 5 days | 1 day | 7-10 days | 5 days | Up to 3 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | NA | NA | |||
| Mac | |||||
| Windows | |||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | n/a | 320 x 320 | NA | NA | 160 x 80 |
| Size | n/a | 1.32 inches | NA | NA | 1.18 inches |
| Touch | n/a | NA | NA | ||
| Type | OLED | LCD | OLED | LED | TFT LCD |
Functions | |||||
| Audio Speaker | |||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | n/a | 5 ATM | 1 ATM | 1 ATM | WR30 |
Notifications | |||||
| Phone | |||||
| Emails | n/a | ||||
| Texts | |||||
Software | |||||
| Operating System | n/a | Wear OS | NA | NA | |
| Apps | |||||
| Music | |||||