vs
5.5Health tracking2.1
4.3Build & durability2.1
Dimensions
Size comparison
Watch Fit 4Loop
| Watch Fit 4 | Loop | Difference | |
|---|---|---|---|
| Height | 43 mm | 42 mm | +1 mm |
| Width | 38 mm | 27 mm | +11 mm |
| Thickness | 9.5 mm | 9 mm | +0.5 mm |
| Weight | 27 g | 29 g | −2 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Fit 4 better than Loop?
- Battery life (smartwatch mode)10 days vs 8 days+25%
- Water resistance5 ATM vs 3 ATM+67%
- Battery capacity400 mAh vs 170 mAh2.4×
- Weight27 g vs 29 g+7%
Why is Loop better than Watch Fit 4?
- Thickness9.5 mm vs 9 mm+6%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 27 mm |
| Weight | 27 g | 29 g |
| Thickness | 9.5 mm | 9 mm |
| Height | 43 mm | 42 mm |
| Width | 38 mm | 27 mm |
| Case material | Aluminium | Stainless steel |
| Water resistance | 5 ATM | 3 ATM |
| Water rating (maker) | — | WR30 |
| Colours | Black, Silver | Greige Sand, Brown Copper, Night Black, Black Cherry, Ice Cream |
| Display | ||
| Screen size | 1.82″ | — |
| Display technology | AMOLED | — |
| Panel | AMOLED | None |
| AMOLED / OLED display | Yes | — |
| Touchscreen | Yes | — |
| Resolution (width) | 408 px | — |
| Resolution (height) | 480 px | — |
| Pixel density | 347 ppi | — |
| Peak brightness | 2,000 nits | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 8 days |
| Battery capacity | 400 mAh | 170 mAh |
| Battery type | Li-Ion | Li-Pol |
| Wireless charging | Yes | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | — |
| Skin temperature | — | No |
| HRV tracking | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | Accelerometer, gyro, heart rate, SpO2, compass, barometer | Accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Dual-band GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Offline maps | — | No |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| LED flashlight | — | No |
| Connectivity | ||
| NFC payments | Yes | — |
| LTE (cellular) | No | — |
| eSIM | No | — |
| Bluetooth | 5.2 | — |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | — |
| Music on the watch | Yes | — |
| Platform | ||
| Operating system | — | Polar OS |
| Platform | — | Proprietary |
| Works with | Android, iOS | Android, iOS |
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