Polar M400 vs. Fitbit Flex 2 vs. Withings Go vs. Fitbit Ionic
 | | | | |
| PolarM400Remove Buy Now | FitbitFlex 2Remove Buy Now | WithingsGoRemove Buy Now | FitbitIonicRemove Buy Now |
Basic Info | ||||
| Suggested Price | $200 | $100 | $80 | $299 |
| Release | 2014 | 2016 | 2016 | 2017 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | n/a | |||
| Oxygen | ||||
| Sleep | ||||
| Steps | ||||
| Swim | ||||
Battery | ||||
| Duration | 8 hours to 30 days | 5 days | 8 months | 4+ days |
| Rechargeable | ||||
Compatibility | ||||
| Android | n/a | |||
| iOS | n/a | |||
| Windows Phone | n/a | n/a | n/a | |
| Mac | n/a | |||
| Windows | n/a | |||
Connectivity | ||||
| Bluetooth | n/a | |||
| Cellular | ||||
| GPS | ||||
| NFC | ||||
| Wi-Fi | ||||
Display | ||||
| Color | n/a | n/a | ||
| Resolution | n/a | n/a | n/a | 348x250 |
| Size | n/a | n/a | n/a | 1.42 |
| Touch | n/a | n/a | ||
| Type | n/a | LED | E-Ink | OLED |
Functions | ||||
| Audio Speaker | Alerts only | |||
| Clock | ||||
| Phone | n/a | |||
| Vibration | n/a | |||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | ||||
| Ultraviolet Sensor | ||||
| Water Resistance | 3 ATM | 5 ATM | 5 ATM | 50m |
Notifications | ||||
| Phone | n/a | |||
| Emails | n/a | |||
| Texts | n/a | |||
Software | ||||
| Operating System | n/a | n/a | n/a | Fitbit OS |
| Apps | n/a | |||
| Music | ||||