Apple Watch SE 3 (44 mm, GPS) / Samsung Galaxy Watch Ultra (47 mm, 2024)

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

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.

SpecificationApple Watch SE 3 (44 mm, GPS)Samsung Galaxy Watch Ultra (47 mm, 2024)
Release year20252024
AnnouncementSeptember 9, 2025; on sale from September 19, 2025 Apple—
Case44 mm aluminium; 44 × 38 × 10.7 mm

A 40 mm version also exists with different size, display and battery values.

Apple		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
Weight32.9 g (GPS) Apple—
DisplayAlways-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		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
Brightness1,000 nits peak; 2 nits minimum Apple—
Front glassIon-X glass

Apple claims 4x better crack resistance than the SE 2.

Apple		—
ProcessorApple 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		Exynos W1000 (5 core, 3 nm) Samsung
Storage64 GB Apple—
SensorsSecond-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		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
Health featuresHeart rate and rhythm notifications, sleep apnoea notifications, sleep stages and sleep score, cycle tracking

Feature availability varies by country.

Apple		—
GesturesDouble tap; wrist flick (watchOS 26)

Wrist flick dismisses notifications and calls, silences alarms and returns to the watch face with one hand.

Apple		—
SpeakerYes; can play music and podcasts Apple—
Water resistance50 metres (ISO 22810:2010); swimproof Apple—
WirelessWi-Fi 4 (802.11n, 2.4 GHz only); Bluetooth 5.3 Apple—
LocationL1 GPS, GLONASS, Galileo, QZSS, BeiDou

This is single-frequency (L1) GPS; position can drift under trees and between tall buildings.

Apple		—
Battery lifeUp 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		—
ChargingFast 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		—
CompatibilityiPhone 11 or later, iPhone SE (2nd generation) or later Apple—
Colour optionsMidnight or Starlight aluminium case Apple—
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
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