Apple Watch Series 12 / Apple Watch Series 9 (45 mm, GPS, aluminium)

Apple Watch Series 12: 42 / 46 mm · Case material options

Apple Watch Series 9 (45 mm, GPS, aluminium): 45 mm aluminium case, GPS model; Pink, Midnight, Starlight, Silver and (PRODUCT)RED. The 41 mm, GPS + Cellular and stainless steel (sapphire crystal) versions differ in size and materials.

Specification	Apple Watch Series 12	Apple Watch Series 9 (45 mm, GPS, aluminium)
Release year	2026	2023
Processor	S11; 64-bit dual-core; 4-core Neural Engine Apple	—
Storage	64 GB Apple	64 GB Apple
Display	Always-On Retina LTPO3 OLED; 326 ppi; 2000 nits peak, 1 nit minimum; 46 mm: 416 × 496; 42 mm: 374 × 446 LTPO3 drops to 1 Hz in Always-On mode to save power. Apple	Always-On Retina LTPO OLED; up to 2000 nits, as low as 1 nit; 326 ppi LTPO is a panel technology that can lower the refresh rate dramatically, letting the display stay dimly on when the wrist is down. The 1-nit minimum avoids glare in a dark room. Apple
Cover glass	Aluminium: Ceramic Shield 2; titanium/ceramic: sapphire Apple	—
Case and material	42 / 46 mm; aluminium, titanium or ceramic Ceramic cases are slightly larger and thicker (9.85 mm); aluminium and titanium are 9.7 mm. Apple	—
Rated battery life	Up to 24 hours normal use; up to 38 hours Low Power Mode; up to 10 hours workout tracking Apple's test profile; actual use varies. Apple	—
Rated charging time	About 80% in 30 minutes; 15 minutes gives up to 12 hours of normal use Apple measured these with a 20 W adapter that is not included; a USB-C fast-charging cable is in the box. Apple	—
Sensors	Second-generation electrical and always-on optical heart sensors; blood oxygen; temperature; compass; always-on altimeter; high-g accelerometer; depth gauge to 6 m; water temperature Apple	—
Health features	ECG; irregular rhythm and high/low heart rate notifications; hypertension and sleep apnoea notifications; sleep score; Vitals; Readiness Some health features are limited by country and age; blood oxygen and temperature are not for medical use. Apple	—
Weight	46 mm aluminium GPS 39.5 g; titanium 44.9 g; 42 mm aluminium GPS 32.2 g; titanium 36.5 g Apple	—
Durability	50 m water resistance (ISO 22810:2010); IP6X dust For swimming and snorkelling to 6 m, not scuba diving. Resistance can diminish over time. Apple	50 m water resistant (ISO 22810:2010); IP6X dust resistant; Ion-X front glass Suitable for swimming. Ion-X is the strengthened glass used on aluminium cases; steel cases use sapphire crystal. Apple
Connectivity	Wi-Fi 4 (2.4 and 5 GHz); Bluetooth 5.3; second-generation UWB; multi-constellation GPS; RedCap 5G on cellular models Apple	—
Compatibility	watchOS 27; iPhone 11 or later (including iPhone SE 2nd generation or later) running iOS 27 Apple	iPhone XS or later with iOS 17 or later It cannot be used with Android phones. Apple
Chip	—	S9 SiP; 64-bit dual-core processor, 4-core Neural Engine Apple
Controls	—	Digital Crown with haptic feedback, side button, double tap gesture Double tap lets you answer notifications or calls by tapping the thumb and index finger of the watch hand together twice, without touching the screen. Apple
Health sensors	—	Electrical heart sensor, third-generation optical heart sensor, temperature sensing The electrical sensor is for ECG recordings; the optical sensor measures pulse with light. Temperature sensing tracks overnight changes in wrist temperature. Apple
Blood Oxygen (US)	—	On watches sold in the US without the feature, a redesigned version arrives with iOS 18.6.1 and watchOS 11.6.1; the reading is calculated on iPhone The watch collects sensor data, the paired iPhone calculates the value and shows it in the Health app. Watches bought outside the US are not affected. Apple
Other sensors	—	Compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor Apple
Location	—	L1 GPS, GNSS, Galileo and BeiDou It is a single-frequency (L1) receiver; drift in cities can be more likely than with dual-frequency watches. Apple
Wireless	—	Wi-Fi 4 (802.11n), Bluetooth 5.3, second-generation Ultra Wideband Ultra Wideband lets you locate an iPhone 15-family phone with Precision Finding showing direction and distance; availability varies by region. Apple
Battery and charging	—	Up to 18 hours normal use, up to 36 hours in Low Power Mode; fast charge to about 80% in 45 minutes Fast charging requires Apple’s fast-charging cable and a suitable adapter. Apple
Size and weight	—	45 × 38 × 10.7 mm; 38.7 g; fits 140–245 mm wrists Apple