Polar M400 vs. Amazfit Bip vs. Garmin Forerunner 45 vs. Michael Kors Access Sofie HR vs. Garmin Vivosmart 4
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| PolarM400Remove Buy Now | AmazfitBipRemove Buy Now | GarminForerunner 45Remove Buy Now | Michael KorsAccess Sofie HRRemove Buy Now | GarminVivosmart 4Remove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $99.99 | $199 | $395 | $130 |
| Release | 2014 | 2018 | 2019 | 2019 | 2018 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 30 days | 7 days | 2 days | 7 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | ||||
| Mac | |||||
| Windows | |||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | n/a | 176 x 176 | 208 x 208 | 390 x 390 | 48 x 128 |
| Size | n/a | 1.28 inches | 1.04 inches | 1.19 inches | 0.74 inches |
| Touch | |||||
| Type | n/a | NA | LCD | OMOLED | OLED |
Functions | |||||
| Audio Speaker | Alerts only | ||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP68 | 5 ATM | 0.3 ATM | 5 ATM |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | Built-in | Wear OS | ||
| Apps | |||||
| Music | |||||