Polar M400 vs. Fitbit Charge vs. Apple Watch 7
 | | | |
| PolarM400Remove Buy Now | FitbitChargeRemove Buy Now | AppleWatch 7Remove Buy Now |
Basic Info | |||
| Suggested Price | $200 | $130 | $429 |
| Release | 2014 | 2014 | 2021 |
Activity & Fitness | |||
| Calories | |||
| Cycling (Bicycling) | |||
| Distance | |||
| Heart | n/a | ||
| Oxygen | |||
| Sleep | |||
| Steps | |||
| Swim | |||
Battery | |||
| Duration | 8 hours to 30 days | 7-10 days | 18 Hours |
| Rechargeable | |||
Compatibility | |||
| Android | |||
| iOS | |||
| Windows Phone | n/a | NA | |
| Mac | |||
| Windows | |||
Connectivity | |||
| Bluetooth | |||
| Cellular | |||
| GPS | |||
| NFC | |||
| Wi-Fi | |||
Display | |||
| Color | |||
| Resolution | n/a | NA | 396 x 484 |
| Size | n/a | NA | 1.9 inches |
| Touch | NA | ||
| Type | n/a | OLED | MicroLED |
Functions | |||
| Audio Speaker | Alerts only | ||
| Clock | |||
| Phone | |||
| Vibration | |||
| Voice | |||
Hardware | |||
| Accelerometer | |||
| Barometer or Altimeter | |||
| Ultraviolet Sensor | |||
| Water Resistance | 3 ATM | 1 ATM | water resistant but not waterproof |
Notifications | |||
| Phone | |||
| Emails | |||
| Texts | |||
Software | |||
| Operating System | n/a | NA | WatchOS 8 |
| Apps | |||
| Music | |||