Polar Loop 2 vs. Garmin Vivosmart 4 vs. Amazfit T-Rex
 | | | |
| PolarLoop 2Remove Buy Now | GarminVivosmart 4Remove Buy Now | AmazfitT-RexRemove Buy Now |
Basic Info | |||
| Suggested Price | $120 | $130 | $140 |
| Release | 2015 | 2018 | 2019 |
Activity & Fitness | |||
| Calories | |||
| Cycling (Bicycling) | |||
| Distance | |||
| Heart | n/a | ||
| Oxygen | |||
| Sleep | |||
| Steps | |||
| Swim | |||
Battery | |||
| Duration | 8 days (without notifications) | 7 days | 20 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 | 48 x 128 | 360 x 360 |
| Size | n/a | 0.74 inches | 1.3 inches |
| Touch | |||
| Type | LED | OLED | AMOLED |
Functions | |||
| Audio Speaker | |||
| Clock | |||
| Phone | |||
| Vibration | |||
| Voice | |||
Hardware | |||
| Accelerometer | |||
| Barometer or Altimeter | |||
| Ultraviolet Sensor | |||
| Water Resistance | 2 ATM | 5 ATM | 5 ATM |
Notifications | |||
| Phone | |||
| Emails | |||
| Texts | |||
Software | |||
| Operating System | n/a | Build-in | |
| Apps | |||
| Music | |||