Polar Loop 2 vs. Michael Kors Access Sofie vs. Fitbit Alta HR vs. Michael Kors Access Sofie HR vs. Amazfit GTR
 | | | | | |
| PolarLoop 2Remove Buy Now | Michael KorsAccess SofieRemove Buy Now | FitbitAlta HRRemove Buy Now | Michael KorsAccess Sofie HRRemove Buy Now | AmazfitGTRRemove Buy Now |
Basic Info | |||||
| Suggested Price | $120 | $395 | $150 | $395 | $199 |
| Release | 2015 | 2017 | 2017 | 2019 | 2019 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 8 days (without notifications) | 1 day | 7 days | 2 days | 24 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | ||||
| Mac | n/a | ||||
| Windows | n/a | ||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | n/a | 390 x 390 1.19 inches | 128 x 36 | 390 x 390 | 454 x 454 |
| Size | n/a | 1.4 inches | 1.19 inches | 1.39 inches | |
| Touch | AMOLDED | ||||
| Type | LED | OLED | OMOLED | AMOLED | |
Functions | |||||
| Audio Speaker | |||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 2 ATM | 1 ATM | 0.3 ATM | 5 ATM | |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | Android Wear 2.0 | Wear OS | Build-in | |
| Apps | |||||
| Music | |||||