vs
9.3Display9.2
8.2Health tracking5.0
3.1Sports & outdoor4.7
7.9Smart features9.0
9.4Build & durability3.8
Dimensions
Size comparison
Watch Ultra 4Watch Ultra
| Watch Ultra 4 | Watch Ultra | Difference | |
|---|---|---|---|
| Height | 49 mm | 46.3 mm | +2.7 mm |
| Width | 44 mm | 46.3 mm | −2.3 mm |
| Thickness | 12 mm | 12.1 mm | −0.1 mm |
| Weight | 63 g | 51 g | +12 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Ultra 4 better than Watch Ultra?
- Water resistance10 ATM vs 5 ATM2×
- Screen size1.98″ vs 1.5″+32%
- Storage64 GB vs 32 GB2×
- Peak brightness3,000 nits vs 2,700 nits+11%
- Battery capacity631 mAh vs 550 mAh+15%
Why is Watch Ultra better than Watch Ultra 4?
- Weight63 g vs 51 g+24%
- Pixel density326 ppi vs 439 ppi+35%
- Resolution (width)422 px vs 466 px+10%
Specifications
Side by side
| Design & durability | ||
| Case size | 49 mm | 46 mm |
| Weight | 63 g | 51 g |
| Thickness | 12 mm | 12.1 mm |
| Height | 49 mm | 46.3 mm |
| Width | 44 mm | 46.3 mm |
| Case material | Titanium | — |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Sapphire crystal | Corning Gorilla Glass 3 |
| Water resistance | 10 ATM | 5 ATM |
| Ingress protection | IP6X | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Water rating (maker) | 100 m | — |
| Military-grade (MIL-STD-810) | Yes | — |
| Colours | Natural, Black | Black, Silver |
| Display | ||
| Screen size | 1.98″ | 1.5″ |
| Display technology | OLED | OLED |
| Panel | Retina LTPO3 OLED | LTPO pOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | — |
| Touchscreen | Yes | — |
| Resolution (width) | 422 px | 466 px |
| Resolution (height) | 514 px | 466 px |
| Pixel density | 326 ppi | 439 ppi |
| Peak brightness | 3,000 nits | 2,700 nits |
| LTPO display | Yes | Yes |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 2.1 days | — |
| Battery life (hours) | 50 h | — |
| Battery capacity | 631 mAh | 550 mAh |
| Battery type | Li-Ion | — |
| Wireless charging | Yes | — |
| Charged in 30 min | 53% | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | — |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | — |
| HRV tracking | Yes | — |
| Sleep tracking | Yes | — |
| Sensors | Accelerometer, gyro, always-on heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water) | Accelerometer, gyro, heart rate, compass, barometer, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | — |
| Dive mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | Yes |
| eSIM | Yes | Yes |
| Satellite messaging | Yes | — |
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 5.3 | 5.3 |
| Ultra Wideband | Yes | — |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | Yes |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Storage | 64 GB | 32 GB |
| RAM | — | 2 GB |
| Platform | ||
| Operating system | watchOS 27 | Android Wear OS 6 |
| Platform | watchOS | Android |
| Works with | iOS | — |
| Chipset | Apple S11 | Qualcomm Snapdragon W5+ Gen 1 |
