vs
6.8Display8.8
8.6Health tracking9.2
6.4Sports & outdoor8.0
7.9Smart features9.0
6.0Build & durability8.4
Dimensions
Size comparison
Watch Series 8Watch Series 9 Aluminum
| Watch Series 8 | Watch Series 9 Aluminum | Difference | |
|---|---|---|---|
| Height | 45 mm | 45 mm | = |
| Width | 38 mm | 38 mm | = |
| Thickness | 10.7 mm | 10.7 mm | = |
| Weight | 42 g | 32 g | +10 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch Series 8 better than Watch Series 9 Aluminum?
Watch Series 8 has no measurable advantages in this pair.
Why is Watch Series 9 Aluminum better than Watch Series 8?
- Peak brightness1,000 nits vs 2,000 nits2×
- Weight42.3 g vs 31.9 g+33%
- Storage32 GB vs 64 GB2×
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 45 mm |
| Weight | 42.3 g | 31.9 g |
| Thickness | 10.7 mm | 10.7 mm |
| Height | 45 mm | 45 mm |
| Width | 38 mm | 38 mm |
| Case material | Stainless steel | Aluminium |
| Sapphire crystal | Yes | Yes |
| Lens / cover glass | Sapphire crystal glass | Ion-X strengthened glass |
| Water resistance | 5 ATM | 5 ATM |
| Ingress protection | IP6X | IP6X |
| Water rating (maker) | 50 m | — |
| Colours | Graphite, Silver, Gold | Midnight, Starlight, Silver, Pink, Red |
| Display | ||
| Screen size | 1.9″ | 1.9″ |
| Display technology | OLED | OLED |
| Panel | Retina LTPO OLED | Retina LTPO OLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | — |
| Resolution (width) | 396 px | 396 px |
| Resolution (height) | 484 px | 484 px |
| Pixel density | 326 ppi | 326 ppi |
| Peak brightness | 1,000 nits | 2,000 nits |
| LTPO display | Yes | Yes |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 0.8 days | — |
| Battery life (hours) | 18 h | — |
| Battery capacity | 308 mAh | 308 mAh |
| Battery type | Li-Ion | Li-Ion |
| Wireless charging | Yes | Yes |
| Charged in 30 min | 53% | 53% |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Skin temperature | Yes | 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, always-on altimeter, compass, SpO2, VO2max, temperature (body) |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | Yes |
| eSIM | Yes | Yes |
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 5.3 | 5.3 |
| Ultra Wideband | Yes | Yes |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | Yes |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Storage | 32 GB | 64 GB |
| RAM | 1 GB | — |
| Platform | ||
| Operating system | watchOS 9.0 | watchOS 10 |
| Platform | watchOS | watchOS |
| Works with | iOS | — |
| Chipset | Apple S8 | Apple S9 |
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