Apple Watch Series 8 (45 mm, GPS) / Apple Watch Series 6 (40 mm, GPS)

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.

Apple Watch Series 6 (40 mm, GPS): Apple Watch Series 6, 40 mm aluminium case, GPS (2020). The 44 mm and GPS + Cellular versions, stainless steel/titanium cases and the Nike and Hermès editions are separate.

Specification	Apple Watch Series 8 (45 mm, GPS)	Apple Watch Series 6 (40 mm, GPS)
Release year	2022	2020
Display	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	Always-On Retina LTPO OLED; 324 × 394 pixels, 759 mm² display area; 1000 nits The Always-On display keeps the time and complications visible with the wrist down. 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	S6 SiP with 64-bit dual-core processor; W3 wireless chip; U1 Ultra Wideband chip Ultra Wideband 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	Blood oxygen sensor (Blood Oxygen app), electrical heart sensor (ECG app), third-generation optical heart sensor Apple states Blood Oxygen measurements are not for medical use and are only designed for general fitness and wellness. The ECG app is not intended for people under 22. 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	—
Location	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	—
Connectivity	Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.3 Apple	—
Storage	32 GB Apple	32 GB 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	Built-in lithium-ion battery; up to 18 hours; magnetic charging cable (1 m) The 18-hour figure comes from Apple’s August 2020 testing with pre-production watches paired to an iPhone; it varies with use. 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	40 × 34 × 10.7 mm; 30.5 g (aluminium, without band) Apple
Compatibility	Requires iPhone 8 or later with iOS 16 or later It cannot be used with Android phones. Apple	Requires an iPhone 6s or later with iOS 14 or later Apple
Colours	Aluminium: Midnight, Starlight, Silver, (PRODUCT)RED Apple	—
Case and version	—	40 mm aluminium case, GPS; Silver, Space Gray, Gold, Blue, (PRODUCT)RED Stainless steel and titanium cases were only sold in the GPS + Cellular version. The 44 mm model uses the same chip but has a different display and weight. Apple
Water resistance	—	50 metres (ISO 22810:2010) Suitable for shallow-water swimming in a pool or the sea, but not scuba diving, waterskiing or high-velocity water. Apple
Other sensors and safety	—	Always-on altimeter, compass, accelerometer up to 32 g with fall detection, gyroscope, ambient light sensor; Emergency SOS On the GPS model, Emergency SOS needs the iPhone nearby; otherwise the watch must be on a known Wi‑Fi network with Wi‑Fi Calling on. International emergency calling is only on the cellular model. Apple
Wireless	—	Wi‑Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.0 LTE and UMTS are only on GPS + Cellular models. Apple
Other	—	Speaker, microphone, Apple Pay, GymKit; ceramic and sapphire crystal back Apple