Samsung Galaxy Watch Ultra (47 mm, 2024) / Apple Watch Series 8 (45 mm, GPS)

Samsung Galaxy Watch Ultra (47 mm, 2024): Galaxy Watch Ultra 47 mm (SM-L705, LTE); Titanium Gray, Titanium White and Titanium Silver at launch. The Galaxy Watch Ultra (2025), sold with a Titanium Blue option, is a later release of the same design whose specifications are not applied to this record; the Galaxy Watch Ultra2 and Galaxy Watch7 are separate models.

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	Samsung Galaxy Watch Ultra (47 mm, 2024)	Apple Watch Series 8 (45 mm, GPS)
Release year	2024	2022
Display	1.5-inch (37.3 mm) 480 × 480 Super AMOLED; full-colour Always On Display; Sapphire Crystal Samsung quotes 3,000 nits peak brightness for readability in sunlight. Night Mode faces switch to red tones in the dark. Samsung	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
Case	47.1 × 47.4 × 12.1 mm; 60.5 g; Titanium Grade 4 frame According to Samsung, Grade 4 titanium is used only on the front and back cover areas of the metal frame; the rest of the frame is a mix of plastic and Grade 2 titanium. Samsung	—
Processor	Exynos W1000 (5 core, 3 nm) Samsung	—
Memory and storage	2 GB memory + 32 GB storage This figure is for the 2024 launch model; the Galaxy Watch Ultra (2025) version may differ. Samsung	—
Battery and charging	590 mAh (typical); up to 100 hours in Power Saving and 48 hours in Exercise Power Saving; WPC-based fast wireless charging In Exercise Power Saving some features, such as network and Bluetooth connections, may be unavailable. Durations come from Samsung’s internal lab tests. Samsung	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
Operating system	Wear OS 5 (Powered by Samsung) with One UI 6 Watch at launch; One UI 8 Watch update released in July 2025 The One UI 8 Watch update brought Watch8 features such as Running Coach, Vascular Load and Antioxidant Index. Samsung	—
Sensors	Samsung BioActive Sensor (Optical Bio-signal sensor + Electrical Heart Signal + Bioelectrical Impedance Analysis), temperature, accelerometer, barometer, gyro, geomagnetic, light sensor Health features are for general wellness, not diagnosis; some measurements depend on the market and the paired phone. Samsung	—
Connectivity	LTE, Bluetooth 5.3, Wi‑Fi 2.4+5 GHz, NFC, GPS (L1+L5) / Glonass / Beidou / Galileo L1+L5 dual-frequency GPS uses two satellite signals to improve location accuracy among tall buildings and trees. Samsung	Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.3 Apple
Durability	10ATM + IP68, MIL-STD-810H; ocean swimming; operation from −20 to 55 °C; altitude from 500 m below sea level to 9,000 m 10ATM means 10 minutes at 100 metres under ISO 22810; Samsung says the watch is not suitable for high-pressure water or scuba diving. IP68 covers 1.5 metres of fresh water for 30 minutes. Samsung	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
Buttons and safety	Two buttons + orange Quick Button; Emergency Siren The Quick Button can be mapped to start and control workouts; holding it sounds the emergency siren. Samsung	—
Phone compatibility	Android 11 or higher with more than 1.5 GB of memory Samsung	—
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
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
Storage	—	32 GB Apple
Size and weight	—	45 × 38 × 10.7 mm; aluminium GPS: 38.8 g Apple
Compatibility	—	Requires iPhone 8 or later with iOS 16 or later It cannot be used with Android phones. Apple
Colours	—	Aluminium: Midnight, Starlight, Silver, (PRODUCT)RED Apple