vs
5.9Display9.3
8.5Health tracking4.9
6.2Sports & outdoor4.7
8.3Smart features9.0
4.2Build & durability4.1
Dimensions
Size comparison
Watch 4Watch Ultra
| Watch 4 | Watch Ultra | Difference | |
|---|---|---|---|
| Height | 46.2 mm | 46.3 mm | −0.1 mm |
| Width | 46.2 mm | 46.3 mm | −0.1 mm |
| Thickness | 10.9 mm | 12.1 mm | −1.2 mm |
| Weight | 48 g | 51 g | −3 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch 4 better than Watch Ultra?
- Weight48 g vs 51 g+6%
- Thickness10.9 mm vs 12.1 mm+11%
Why is Watch Ultra better than Watch 4?
- Pixel density310 ppi vs 439 ppi+42%
- Battery capacity530 mAh vs 550 mAh+4%
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | 46 mm |
| Weight | 48 g | 51 g |
| Thickness | 10.9 mm | 12.1 mm |
| Height | 46.2 mm | 46.3 mm |
| Width | 46.2 mm | 46.3 mm |
| Case material | Stainless steel | — |
| Lens / cover glass | — | Corning Gorilla Glass 3 |
| Strap material | Leder, Fluorelastomer | — |
| Water resistance | 5 ATM | 5 ATM |
| Ingress protection | IP6X | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Water rating (maker) | 50 m / 5 bar / 5 ATM | — |
| Colours | Black | Black, Silver |
| Display | ||
| Screen size | 1.5″ | 1.5″ |
| Display technology | AMOLED | OLED |
| Panel | AMOLED | LTPO pOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 466 px | 466 px |
| Resolution (height) | 466 px | 466 px |
| Pixel density | 310 ppi | 439 ppi |
| Peak brightness | — | 2,700 nits |
| LTPO display | — | Yes |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 3 days | — |
| Battery capacity | 530 mAh | 550 mAh |
| Battery type | Li-Ion | — |
| Wireless charging | Yes | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | — |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | — |
| Sleep tracking | Yes | — |
| Sensors | Accelerometer, gyro, heart rate, barometer, compass, SpO2, thermometer (body temperature) | Accelerometer, gyro, heart rate, compass, barometer, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | — | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | Yes |
| eSIM | Yes | Yes |
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 5.2 | 5.3 |
| Smart features | ||
| Speaker | Yes | Yes |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Storage | 32 GB | 32 GB |
| RAM | 2 GB | 2 GB |
| Platform | ||
| Operating system | HarmonyOS 3.0 | Android Wear OS 6 |
| Platform | HarmonyOS | Android |
| Works with | iOS, Android | — |
| Chipset | Qualcomm Snapdragon W5 Gen 1 | Qualcomm Snapdragon W5+ Gen 1 |
