Apple
Device summary
Apple
Apple Watch Series 9 45mm
Full specifications
| Basic information | ||
|---|---|---|
| Release year | 2025 | 2023 |
| Starting price | — | — |
| Display size | — | — |
| Dimensions | 38.0 mm × 44.0 mm × 10.7 mm | 38.0 mm × 45.0 mm × 10.7 mm |
| Weight | 33 g | 39 g |
| Front material | Ion-X glass | Ion-X glass or sapphire crystal |
| Back material | — | — |
| Display | ||
| Display technology | Retina LTPO OLED | Always-On Retina LTPO OLED |
| Resolution | 368 × 448 | — |
| Protection | Ion-X glass | Ion-X glass (aluminum) / Sapphire (stainless steel) |
| Peak brightness | — | 2000 nits |
| Performance | ||
| Chipset | Apple S10 SiP | Apple S9 SiP |
| Storage | 64 GB | 64 GB |
| Expandable storage | No | No |
| Battery & charging | ||
| Charging standard | Apple Watch Magnetic Fast Charger | Apple Watch Magnetic Fast Charger |
| Battery type | Built-in rechargeable lithium-ion | Built-in rechargeable lithium-ion |
| Connectivity | ||
| Cellular | LTE (GPS + Cellular models) | LTE (GPS + Cellular models) |
| Wi‑Fi | Wi‑Fi 4 (802.11n) | Wi‑Fi 4 (802.11n) |
| Bluetooth | Bluetooth 5.3 | Bluetooth 5.3 |
| NFC | Yes | Yes |
| Build & durability | ||
| Frame | Aluminum | Aluminum or stainless steel |
| Ingress protection | Water resistance 50m | Water resistance 50m; IP6X dust resistance |
| Basic information | ||
|---|---|---|
| Release year | 2025 | 2023 |
| Starting price | — | — |
| Display size | — | — |
| Dimensions | 38.0 mm × 44.0 mm × 10.7 mm | 38.0 mm × 45.0 mm × 10.7 mm |
| Weight | 33 g | 39 g |
| Front material | Ion-X glass | Ion-X glass or sapphire crystal |
| Back material | — | — |
| Display | ||
| Display technology | Retina LTPO OLED | Always-On Retina LTPO OLED |
| Resolution | 368 × 448 | — |
| Protection | Ion-X glass | Ion-X glass (aluminum) / Sapphire (stainless steel) |
| Peak brightness | — | 2000 nits |
| Performance | ||
| Chipset | Apple S10 SiP | Apple S9 SiP |
| Storage | 64 GB | 64 GB |
| Expandable storage | No | No |
| Battery & charging | ||
| Charging standard | Apple Watch Magnetic Fast Charger | Apple Watch Magnetic Fast Charger |
| Battery type | Built-in rechargeable lithium-ion | Built-in rechargeable lithium-ion |
| Connectivity | ||
| Cellular | LTE (GPS + Cellular models) | LTE (GPS + Cellular models) |
| Wi‑Fi | Wi‑Fi 4 (802.11n) | Wi‑Fi 4 (802.11n) |
| Bluetooth | Bluetooth 5.3 | Bluetooth 5.3 |
| NFC | Yes | Yes |
| Build & durability | ||
| Frame | Aluminum | Aluminum or stainless steel |
| Ingress protection | Water resistance 50m | Water resistance 50m; IP6X dust resistance |
Key differences
The most meaningful measured gaps in size and weight — not an overall winner.
Weight
Apple Watch SE 3 44mm
6 g lighter · minor difference
Height
Apple Watch Series 9 45mm
1 mm taller · minor difference
Width
Very similar width
Thickness
Very similar thickness