vs
9.3Display9.7
8.2Health tracking8.6
3.1Sports & outdoor8.0
7.9Smart features6.5
Dimensions
Size comparison
Watch Ultra 4Watch D3
| Watch Ultra 4 | Watch D3 | Difference | |
|---|---|---|---|
| Height | 49 mm | 46.5 mm | +2.5 mm |
| Width | 44 mm | 41 mm | +3 mm |
| Thickness | 12 mm | 11.3 mm | +0.7 mm |
| Weight | 63 g | 40 g | +23 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Ultra 4 better than Watch D3?
- LTE (cellular)Yes · Watch D3: No
- eSIMYes · Watch D3: No
- Screen size1.98″ vs 1.92″+3%
- Resolution (width)422 px vs 408 px+3%
Why is Watch D3 better than Watch Ultra 4?
- Battery life (smartwatch mode)2.1 days vs 6 days2.9×
- Weight63 g vs 40 g+57%
- Thickness12 mm vs 11.3 mm+6%
Specifications
Side by side
| Design & durability | ||
| Case size | 49 mm | 46 mm |
| Weight | 63 g | 40 g |
| Thickness | 12 mm | 11.3 mm |
| Height | 49 mm | 46.5 mm |
| Width | 44 mm | 41 mm |
| Case material | Titanium | Aluminium |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Sapphire crystal | 2.5D-Glas |
| Strap material | — | Textil |
| Water resistance | 10 ATM | — |
| Ingress protection | IP6X | — |
| Water rating (maker) | 100 m | — |
| Military-grade (MIL-STD-810) | Yes | — |
| Colours | Natural, Black | Black, Gold |
| Display | ||
| Screen size | 1.98″ | 1.92″ |
| Display technology | OLED | AMOLED |
| Panel | Retina LTPO3 OLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 422 px | 408 px |
| Resolution (height) | 514 px | 480 px |
| Pixel density | 326 ppi | 328 ppi |
| Peak brightness | 3,000 nits | 3,000 nits |
| LTPO display | Yes | — |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 2.1 days | 6 days |
| Battery life (hours) | 50 h | — |
| Battery capacity | 631 mAh | — |
| Battery type | Li-Ion | — |
| Wireless charging | Yes | Yes |
| Charging | — | kabellos, magnetische Ladeschale |
| Charged in 30 min | 53% | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Skin temperature | Yes | Yes |
| Temperature sensor | Yes | Yes |
| HRV tracking | Yes | — |
| Sleep tracking | Yes | Yes |
| Sensors | Accelerometer, gyro, always-on heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water) | Accelerometer, gyro, compass, heart rate, SpO2, thermometer (skin temperature), differential pressure sensor, barometer |
| 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 | — |
| Dive mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | No |
| eSIM | Yes | No |
| Satellite messaging | Yes | — |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.3 | 6 |
| 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 | — |
| Platform | ||
| Operating system | watchOS 27 | HarmonyOS |
| Platform | watchOS | HarmonyOS |
| Works with | iOS | iOS, Android |
| Chipset | Apple S11 | — |
