Apple Watch SE 3 (44 mm, GPS) / Apple Watch Series 8 (45 mm, GPS)

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

Apple Watch Series 8 (45 mm, GPS): Apple Watch Series 8, 45 mm aluminium case, GPS model. The 41 mm case, GPS + Cellular and stainless steel versions are separate models; weight and screen size differ.

Specification	Apple Watch SE 3 (44 mm, GPS)	Apple Watch Series 8 (45 mm, GPS)
Release year	2025	2022
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; 396 × 484 pixels; 1143 sq mm display area; up to 1000 nits The LTPO panel can lower its refresh rate a lot, so the screen stays on dimmed when the wrist is down. 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	32 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	—
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, GLONASS, Galileo, QZSS and BeiDou; compass; always-on altimeter This is single-frequency (L1) GPS; drift between tall buildings can be higher than on dual-frequency models. 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	Requires iPhone 8 or later with iOS 16 or later It cannot be used with Android phones. Apple
Colour options	Midnight or Starlight aluminium case Apple	—
Chip	—	S8 SiP with 64-bit dual-core processor; W3 wireless chip; U1 (Ultra Wideband) Ultra Wideband is used for close-range location with an iPhone; availability varies by region. Apple
Health sensors	—	Blood oxygen sensor; electrical heart sensor (ECG app); third-generation optical heart sensor The Blood Oxygen app is not for medical use. The ECG app is not intended for people under 22 and may not be available in every country. Apple
Motion and safety	—	High-g accelerometer up to 256 g (Fall Detection and Crash Detection); high dynamic range gyroscope; Emergency SOS; international emergency calling On the GPS model, Emergency SOS needs a nearby iPhone or Wi-Fi Calling; international emergency calling works only on cellular models. Apple
Connectivity	—	Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.3 Apple
Battery and charging	—	Up to 18 hours; built-in lithium-ion battery; USB-C magnetic fast charging cable Apple’s 18-hour figure is based on 90 time checks, 90 notifications, 45 minutes of app use and a 60-minute workout with music; sleep tracking is not part of that scenario. Apple
Durability	—	Water resistant to 50 metres under ISO 22810:2010; IP6X dust; ceramic and sapphire crystal back Suitable for shallow-water activities in a pool or the sea; not for scuba diving, waterskiing or high-velocity water. Apple
Size and weight	—	45 × 38 × 10.7 mm; aluminium GPS: 38.8 g Apple
Colours	—	Aluminium: Midnight, Starlight, Silver, (PRODUCT)RED Apple