vs
9.3Display4.0
8.0Health tracking4.9
7.9Smart features3.8
Dimensions
Size comparison
Watch Ultra 4Z-Watch Active
| Watch Ultra 4 | Z-Watch Active | Difference | |
|---|---|---|---|
| Height | 49 mm | 48.3 mm | +0.7 mm |
| Width | 44 mm | 39 mm | +5 mm |
| Thickness | 12 mm | 12 mm | = |
| Weight | 63 g | 45 g | +18 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Ultra 4 better than Z-Watch Active?
- Built-in GPSYes · Z-Watch Active: No
- AMOLED / OLED displayYes · Z-Watch Active: No
- NFC paymentsYes · Z-Watch Active: No
- LTE (cellular)Yes · Z-Watch Active: No
- eSIMYes · Z-Watch Active: No
- Resolution (width)422 px vs 240 px+76%
- Pixel density326 ppi vs 190 ppi+72%
- Battery capacity631 mAh vs 600 mAh+5%
Why is Z-Watch Active better than Watch Ultra 4?
- Weight63 g vs 45 g+40%
Specifications
Side by side
| Design & durability | ||
| Case size | 49 mm | 48 mm |
| Weight | 63 g | 45 g |
| Thickness | 12 mm | 12 mm |
| Height | 49 mm | 48.3 mm |
| Width | 44 mm | 39 mm |
| Case material | Titanium | Plastic / polymer |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Sapphire crystal | — |
| Water resistance | 10 ATM | — |
| Ingress protection | IP6X | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Water rating (maker) | 100 m | — |
| Military-grade (MIL-STD-810) | Yes | — |
| Colours | Natural, Black | Black, Gold, Silver |
| Display | ||
| Screen size | 1.98″ | 2.01″ |
| Display technology | OLED | LCD |
| Panel | Retina LTPO3 OLED | IPS LCD |
| AMOLED / OLED display | Yes | No |
| Always-on display | Yes | — |
| Touchscreen | Yes | — |
| Resolution (width) | 422 px | 240 px |
| Resolution (height) | 514 px | 296 px |
| Pixel density | 326 ppi | 190 ppi |
| Peak brightness | 3,000 nits | — |
| LTPO display | Yes | — |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 2.1 days | — |
| Battery life (hours) | 50 h | — |
| Battery capacity | 631 mAh | 600 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 | — |
| 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, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | No |
| Dual-band GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Multisport / triathlon mode | Yes | — |
| Dive mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | No |
| 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 27 | Zeed WatchOS |
| Platform | watchOS | Proprietary |
| Works with | iOS | — |
| Chipset | Apple S11 | — |
