Polar Loop 2 vs. Garmin Vivosmart 4 vs. Amazfit T-Rex vs. Apple SE
 | | | | |
| PolarLoop 2Remove Buy Now | GarminVivosmart 4Remove Buy Now | AmazfitT-RexRemove Buy Now | AppleSERemove Buy Now |
Basic Info | ||||
| Suggested Price | $120 | $130 | $140 | $279 |
| Release | 2015 | 2018 | 2019 | 2020 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | n/a | |||
| Oxygen | ||||
| Sleep | ||||
| Steps | ||||
| Swim | ||||
Battery | ||||
| Duration | 8 days (without notifications) | 7 days | 20 days | 18 hours |
| 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 | 384 x 480 |
| Size | n/a | 0.74 inches | 1.3 inches | 40mm |
| Touch | ||||
| Type | LED | OLED | AMOLED | MicroLED |
Functions | ||||
| Audio Speaker | ||||
| Clock | ||||
| Phone | ||||
| Vibration | ||||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | ||||
| Ultraviolet Sensor | Not yet | |||
| Water Resistance | 2 ATM | 5 ATM | 5 ATM | |
Notifications | ||||
| Phone | ||||
| Emails | ||||
| Texts | ||||
Software | ||||
| Operating System | n/a | Build-in | WatchOS 5 | |
| Apps | ||||
| Music | ||||