Polar M400 vs. Samsung Gear 2 vs. Fitbit Charge 3 vs. Xiaomi Mi Band vs. Garmin VivoActive 4
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| PolarM400Remove Buy Now | SamsungGear 2Remove Buy Now | FitbitCharge 3Remove Buy Now | XiaomiMi BandRemove Buy Now | GarminVivoActive 4Remove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $300 | $150 | $15 | $349 |
| Release | 2014 | 2014 | 2018 | 2015 | 2019 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | NA | ||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 2-3 days | 7 days | 30 days | 8 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | NA | |||
| Mac | NA | NA | |||
| Windows | NA | Not yet | NA | ||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | NA | ||||
| Wi-Fi | |||||
Display | |||||
| Color | NA | ||||
| Resolution | n/a | 320 x 320 | 66 x 18 | NA | 260 x 260 |
| Size | n/a | 1.63 inches | .721 inches | NA | 1.3ionches |
| Touch | NA | ||||
| Type | n/a | Super AMOLED | OLED | NA | MIP |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP67 | 5 ATM | IP67 | 5 ATM |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | Tizen OS | NA | NA | Wear OS |
| Apps | |||||
| Music | |||||