vs
9.8Build & durability9.3
Dimensions
Size comparison
J888Galaxy Watch Ultra 2025
| J888 | Galaxy Watch Ultra 2025 | Difference | |
|---|---|---|---|
| Case size | 45 mm | 47.1 mm | −2.1 mm |
| Thickness | 14 mm | 12.1 mm | +1.9 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is J888 better than Galaxy Watch Ultra 2025?
- Water resistance20 ATM vs 10 ATM2×
Why is Galaxy Watch Ultra 2025 better than J888?
- Thickness14 mm vs 12.1 mm+16%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 47 mm |
| Weight | — | 61 g |
| Thickness | 14 mm | 12.1 mm |
| Height | — | 47.4 mm |
| Width | — | 47.1 mm |
| Case material | Stainless steel | Titanium |
| Sapphire crystal | Yes | Yes |
| Lens / cover glass | Saphirglas Saphirglas | Saphirglas Saphirglas |
| Strap material | Edelstahl | Silikon |
| Water resistance | 20 ATM | 10 ATM |
| Ingress protection | — | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Water rating (maker) | 200 m / 20 bar / 20 ATM | 100 m / 10 bar / 10 ATM |
| Military-grade (MIL-STD-810) | — | Yes |
| Colours | Silver | — |
| Display | ||
| Screen size | — | 1.5″ |
| Display technology | — | AMOLED |
| Panel | — | Super AMOLED |
| AMOLED / OLED display | — | Yes |
| Resolution (width) | — | 480 px |
| Resolution (height) | — | 480 px |
| Battery | ||
| Battery life (smartwatch mode) | — | 2.5 days |
| Battery life (hours) | — | 60 h |
| Battery capacity | — | 590 mAh |
| Battery type | — | Li-Po |
| Wireless charging | — | Yes |
| Charging | — | kabellos, magnetisches Ladekabel, magnetische Ladeschale |
| Health sensors | ||
| Optical heart rate | — | Yes |
| Blood oxygen (SpO2) | — | Yes |
| ECG | — | Yes |
| Skin temperature | — | Yes |
| HRV tracking | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | accelerometer | heart rate, SpO2, barometer, accelerometer, ambient light |
| Sports & navigation | ||
| Built-in GPS | — | Yes |
| Satellite systems | — | GPS, GLONASS, GALILEO, BDS |
| Barometric altimeter | — | Yes |
| Multisport / triathlon mode | — | Yes |
| Connectivity | ||
| NFC payments | — | Yes |
| LTE (cellular) | — | Yes |
| Wi-Fi | — | Wi-Fi 1 |
| Bluetooth | 5 | 5.3 |
| Smart features | ||
| Voice assistant | — | Yes |
| Music on the watch | — | Yes |
| Storage | — | 64 GB |
| RAM | — | 2 GB |
| Platform | ||
| Operating system | — | wear OS 6, One UI 8 |
| Platform | — | Wear OS |
| Works with | iOS, Android | Android |
| Chipset | — | Exynos W1000 |
