vs
8.4Build & durability9.8
Dimensions
Size comparison
Watch Series 9 AluminumJ888
| Watch Series 9 Aluminum | J888 | Difference | |
|---|---|---|---|
| Case size | 38 mm | 45 mm | −7 mm |
| Thickness | 10.7 mm | 14 mm | −3.3 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Series 9 Aluminum better than J888?
- Thickness10.7 mm vs 14 mm+31%
Why is J888 better than Watch Series 9 Aluminum?
- Water resistance5 ATM vs 20 ATM4×
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 45 mm |
| Weight | 31.9 g | — |
| Thickness | 10.7 mm | 14 mm |
| Height | 45 mm | — |
| Width | 38 mm | — |
| Case material | Aluminium | Stainless steel |
| Sapphire crystal | Yes | Yes |
| Lens / cover glass | Ion-X strengthened glass | Saphirglas Saphirglas |
| Strap material | — | Edelstahl |
| Water resistance | 5 ATM | 20 ATM |
| Ingress protection | IP6X | — |
| Water rating (maker) | — | 200 m / 20 bar / 20 ATM |
| Colours | Midnight, Starlight, Silver, Pink, Red | Silver |
| Display | ||
| Screen size | 1.9″ | — |
| Display technology | OLED | — |
| Panel | Retina LTPO OLED | — |
| AMOLED / OLED display | Yes | — |
| Resolution (width) | 396 px | — |
| Resolution (height) | 484 px | — |
| Pixel density | 326 ppi | — |
| Peak brightness | 2,000 nits | — |
| LTPO display | Yes | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery capacity | 308 mAh | — |
| Battery type | Li-Ion | — |
| Wireless charging | Yes | — |
| Charged in 30 min | 53% | — |
| Health sensors | ||
| Optical heart rate | Yes | — |
| Blood oxygen (SpO2) | Yes | — |
| ECG | Yes | — |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | — |
| Sensors | Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body) | accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Connectivity | ||
| NFC payments | Yes | — |
| LTE (cellular) | Yes | — |
| eSIM | Yes | — |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.3 | 5 |
| Ultra Wideband | Yes | — |
| Smart features | ||
| Speaker | Yes | — |
| Storage | 64 GB | — |
| Platform | ||
| Operating system | watchOS 10 | — |
| Platform | watchOS | — |
| Works with | — | iOS, Android |
| Chipset | Apple S9 | — |
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