Polar M400 vs. Fitbit Zip vs. Xiaomi Mi Band 2 vs. Amazfit Bip
 | | | | |
| PolarM400Remove Buy Now | FitbitZipRemove Buy Now | XiaomiMi Band 2Remove Buy Now | AmazfitBipRemove Buy Now |
Basic Info | ||||
| Suggested Price | $200 | $60 | $23 | $99.99 |
| Release | 2014 | 2012 | 2016 | 2018 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | n/a | |||
| Oxygen | ||||
| Sleep | ||||
| Steps | n/a | |||
| Swim | ||||
Battery | ||||
| Duration | 8 hours to 30 days | 6 months | 20 hours | 30 days |
| Rechargeable | ||||
Compatibility | ||||
| Android | ||||
| iOS | ||||
| Windows Phone | n/a | n/a | ||
| Mac | n/a | |||
| Windows | n/a | |||
Connectivity | ||||
| Bluetooth | ||||
| Cellular | ||||
| GPS | ||||
| NFC | ||||
| Wi-Fi | ||||
Display | ||||
| Color | ||||
| Resolution | n/a | n/a | n/a | 176 x 176 |
| Size | n/a | n/a | 0.42 inches | 1.28 inches |
| Touch | ||||
| Type | n/a | n/a | OLED | NA |
Functions | ||||
| Audio Speaker | Alerts only | |||
| Clock | ||||
| Phone | ||||
| Vibration | ||||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | ||||
| Ultraviolet Sensor | ||||
| Water Resistance | 3 ATM | Splash Resistant | IP67 | IP68 |
Notifications | ||||
| Phone | ||||
| Emails | ||||
| Texts | ||||
Software | ||||
| Operating System | n/a | n/a | n/a | |
| Apps | ||||
| Music | ||||