vs
9.3Display6.0
8.6Health tracking9.6
3.1Sports & outdoor8.0
7.9Smart features6.5
9.6Build & durability8.0
Dimensions
Size comparison
Watch Ultra 3Watch S4 41mm
| Watch Ultra 3 | Watch S4 41mm | Difference | |
|---|---|---|---|
| Height | 49 mm | 41.2 mm | +7.8 mm |
| Width | 44 mm | 41.2 mm | +2.8 mm |
| Thickness | 12 mm | 9.5 mm | +2.5 mm |
| Weight | 62 g | 32 g | +30 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Ultra 3 better than Watch S4 41mm?
- Water resistance10 ATM vs 5 ATM2×
- LTE (cellular)Yes · Watch S4 41mm: No
- Screen size1.98″ vs 1.32″+50%
- Peak brightness3,000 nits vs 2,200 nits+36%
- eSIMYes · Watch S4 41mm: No
- Battery capacity599 mAh vs 320 mAh+87%
Why is Watch S4 41mm better than Watch Ultra 3?
- Weight61.6 g vs 32 g+92%
- Thickness12 mm vs 9.5 mm+26%
- Resolution (width)422 px vs 466 px+10%
Specifications
Side by side
| Design & durability | ||
| Case size | 49 mm | 41 mm |
| Weight | 61.6 g | 32 g |
| Thickness | 12 mm | 9.5 mm |
| Height | 49 mm | 41.2 mm |
| Width | 44 mm | 41.2 mm |
| Case material | Titanium | — |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Sapphire crystal glass | Scratch/drop-proof glass |
| Water resistance | 10 ATM | 5 ATM |
| Ingress protection | IP6X | — |
| Water rating (maker) | 100 m | — |
| Military-grade (MIL-STD-810) | Yes | — |
| Colours | Natural, Black | Black, Green, White, Gold |
| Display | ||
| Screen size | 1.98″ | 1.32″ |
| Display technology | OLED | AMOLED |
| Panel | Retina LTPO3 OLED | AMOLED |
| 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 | 320 ppi |
| Peak brightness | 3,000 nits | 2,200 nits |
| LTPO display | Yes | — |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 1.5 days | — |
| Battery life (hours) | 36 h | — |
| Battery capacity | 599 mAh | 320 mAh |
| Battery type | Li-Ion | Li-Po |
| 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 | Yes |
| Temperature sensor | Yes | Yes |
| Sleep tracking | Yes | — |
| Sensors | Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water) | Accelerometer, gyro, compass, barometer, heart rate, SpO2, thermometer (skin temperature) |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | 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 | 5.4 |
| 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 26 | HyperOS 2 |
| Platform | watchOS | Proprietary |
| Works with | iOS | — |
| Chipset | Apple S10 | — |
