Apple Watch SE 3 (44 mm, GPS) / Apple Watch Series 9 (45 mm, GPS, aluminium)

Apple Watch SE 3 (44 mm, GPS): 44 mm GPS · aluminium case (Midnight / Starlight)

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 SE 3 (44 mm, GPS)	Apple Watch Series 9 (45 mm, GPS, aluminium)
Release year	2025	2023
Announcement	September 9, 2025; on sale from September 19, 2025 Apple	—
Case	44 mm aluminium; 44 × 38 × 10.7 mm A 40 mm version also exists with different size, display and battery values. Apple	—
Weight	32.9 g (GPS) Apple	—
Display	Always-On Retina, LTPO OLED; 368 × 448 pixels, 977 mm², 326 ppi Because the LTPO panel can lower its refresh rate, the display keeps showing the time and notifications with the wrist down; this is the first SE with Always-On. 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
Brightness	1,000 nits peak; 2 nits minimum Apple	—
Front glass	Ion-X glass Apple claims 4x better crack resistance than the SE 2. Apple	—
Processor	Apple S10 SiP; 64-bit dual-core processor, 4-core Neural Engine The S10 enables the Always-On display, double tap and wrist flick gestures, on-device Siri and fast charging. Apple	—
Storage	64 GB Apple	64 GB Apple
Sensors	Second-generation optical heart sensor, temperature sensor, compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor There is no ECG or blood oxygen sensor. The temperature sensor is not intended for medical use. Apple	—
Health features	Heart rate and rhythm notifications, sleep apnoea notifications, sleep stages and sleep score, cycle tracking Feature availability varies by country. Apple	—
Gestures	Double tap; wrist flick (watchOS 26) Wrist flick dismisses notifications and calls, silences alarms and returns to the watch face with one hand. Apple	—
Speaker	Yes; can play music and podcasts Apple	—
Water resistance	50 metres (ISO 22810:2010); swimproof Apple	—
Wireless	Wi-Fi 4 (802.11n, 2.4 GHz only); Bluetooth 5.3 Apple	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
Location	L1 GPS, GLONASS, Galileo, QZSS, BeiDou This is single-frequency (L1) GPS; position can drift under trees and between tall buildings. Apple	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
Battery life	Up to 18 hours of normal use; up to 32 hours in Low Power Mode In Apple's test the watch stays connected to an iPhone over Bluetooth throughout; results vary with use and settings. Apple	—
Charging	Fast charging: about 80% in 45 minutes; 15 minutes gives up to 8 hours of use Times are with the included Apple Watch Magnetic Fast Charger to USB-C Cable; no adapter is included. Apple	—
Compatibility	iPhone 11 or later, iPhone SE (2nd generation) or later Apple	iPhone XS or later with iOS 17 or later It cannot be used with Android phones. Apple
Colour options	Midnight or Starlight aluminium case 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
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
Durability	—	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
Size and weight	—	45 × 38 × 10.7 mm; 38.7 g; fits 140–245 mm wrists Apple