Samsung Galaxy Watch Ultra (47 mm, 2024) / Apple Watch SE (2nd generation, 44 mm)

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 SE (2nd generation, 44 mm): Apple Watch SE (2nd generation), 44 mm aluminium case; GPS and GPS + Cellular models. The 40 mm case, the original Apple Watch SE (2020) and Apple Watch SE 3 are separate models.

Specification	Samsung Galaxy Watch Ultra (47 mm, 2024)	Apple Watch SE (2nd generation, 44 mm)
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	Retina LTPO OLED; 368 × 448 pixels, 977 sq mm display area, 326 ppi; up to 1000 nits; Ion-X glass SE has no always-on mode; the screen wakes when you raise your wrist. Ion-X is strengthened glass and is not as scratch-resistant as sapphire. 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	—
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	2nd-gen optical heart sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor The high-g accelerometer and gyroscope are used for Crash Detection. ECG, blood oxygen and temperature sensors are not included on this model. Apple
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	—
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	—
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	—
Case and weight	—	44 × 38 × 10.7 mm aluminium case; GPS 32.9 g, GPS + Cellular 33 g Weight is for the case only and rises with the band. The 44 mm case fits 140–245 mm wrists. Apple
Chip and storage	—	S8 SiP (64-bit dual-core processor); 2-core Neural Engine; 32 GB Storage holds music, podcasts and apps and cannot be expanded. Apple
Safety features	—	Emergency SOS; International Emergency Calling; Fall Detection; Crash Detection Crash Detection can call emergency services after a severe car crash. Emergency SOS needs a cellular connection or Wi-Fi calling with internet access from the watch or a nearby iPhone. Apple
Battery	—	Up to 18 hours; about 80% charge in about 1.5 hours Apple measures 18 hours with 90 time checks, 90 notifications, 45 minutes of app use and a 60-minute workout with music; on the cellular model, 4 of those hours are on LTE. Longer GPS workouts shorten it. Apple
Water resistance	—	50 metres under ISO 22810:2010 Suitable for swimming, but not for scuba diving, water skiing or high-velocity water sports. Apple
Location and wireless	—	L1 GPS, GNSS, Galileo and QZSS; Wi-Fi 4 (802.11n); Bluetooth 5.3; LTE and UMTS on the GPS + Cellular model The cellular model can make calls and use data without your iPhone nearby; carrier support is required. Apple
Compatibility	—	iPhone Xs or later with iOS 18 The watch can only be set up and used with an iPhone; it does not work with Android phones. Apple
Colours	—	Midnight, Starlight and Silver Apple