vs
8.8Display6.9
9.2Health tracking5.0
8.0Sports & outdoor4.7
9.0Smart features5.4
8.4Build & durability6.1
Dimensions
Size comparison
Watch Series 9 AluminumWatch GT 4
| Watch Series 9 Aluminum | Watch GT 4 | Difference | |
|---|---|---|---|
| Height | 45 mm | 46 mm | −1 mm |
| Width | 38 mm | 46 mm | −8 mm |
| Thickness | 10.7 mm | 10.9 mm | −0.2 mm |
| Weight | 32 g | 37 g | −5 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Series 9 Aluminum better than Watch GT 4?
- LTE (cellular)Yes · Watch GT 4: No
- Screen size1.9″ vs 1.43″+33%
- eSIMYes · Watch GT 4: No
- Weight31.9 g vs 37 g+16%
Why is Watch GT 4 better than Watch Series 9 Aluminum?
- Battery capacity308 mAh vs 524 mAh+70%
- Resolution (width)396 px vs 466 px+18%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 46 mm |
| Weight | 31.9 g | 37 g |
| Thickness | 10.7 mm | 10.9 mm |
| Height | 45 mm | 46 mm |
| Width | 38 mm | 46 mm |
| Case material | Aluminium | Stainless steel |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Ion-X strengthened glass | — |
| Water resistance | 5 ATM | 5 ATM |
| Ingress protection | IP6X | — |
| Colours | Midnight, Starlight, Silver, Pink, Red | Black, Steel, Silver, Gold |
| Display | ||
| Screen size | 1.9″ | 1.43″ |
| Display technology | OLED | AMOLED |
| Panel | Retina LTPO OLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 396 px | 466 px |
| Resolution (height) | 484 px | 466 px |
| Pixel density | 326 ppi | 326 ppi |
| Peak brightness | 2,000 nits | — |
| LTPO display | Yes | — |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | — | 14 days |
| Battery capacity | 308 mAh | 524 mAh |
| Battery type | Li-Ion | Li-Ion |
| Wireless charging | Yes | 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 | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body) | Accelerometer, gyro, heart rate, barometer, compass, SpO2, thermometer (body 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 |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | No |
| eSIM | Yes | No |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.3 | 5.2 |
| Ultra Wideband | Yes | — |
| Smart features | ||
| Calls from the wrist | — | Yes |
| Speaker | Yes | Yes |
| Music on the watch | — | Yes |
| Storage | 64 GB | — |
| Platform | ||
| Operating system | watchOS 10 | HarmonyOS 4.0 |
| Platform | watchOS | HarmonyOS |
| Works with | — | Android, iOS |
| Chipset | Apple S9 | — |
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