Google Pixel Watch 4 (41 mm, Wi-Fi) / Samsung Galaxy Watch Ultra (47 mm, 2024)

Google Pixel Watch 4 (41 mm, Wi-Fi): 41 mm Wi-Fi (GA10840-US) · Polished Silver aluminium case

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.

SpecificationGoogle Pixel Watch 4 (41 mm, Wi-Fi)Samsung Galaxy Watch Ultra (47 mm, 2024)
Release year20252024
Case41 mm, 100% recycled aluminium; 12.3 mm height Google47.1 × 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
Weight31.0 g (without band)

The 45 mm model weighs 36.7 g.

Google		—
DisplayCurved Actua 360 AMOLED LTPO; 320 ppi; DCI-P3; always-on display

GIGAZINE gives the 41 mm model's resolution as 426 × 426.

Google		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
Brightness and refreshUp to 3000 nits peak; 1 nit minimum in always-on mode; 1–60 Hz

The ability to drop to 1 Hz reduces the battery cost of the always-on display.

Google		—
Display glassCustom 3D Corning Gorilla Glass 5 Google—
ProcessorQualcomm Snapdragon W5 Gen 2; Cortex-M55 co-processor

The co-processor handles notifications and sensor work while the screen is off without waking the main processor, saving battery.

Google		Exynos W1000 (5 core, 3 nm) Samsung
Memory and storage2 GB SDRAM; 32 GB eMMC Google2 GB memory + 32 GB storage

This figure is for the 2024 launch model; the Galaxy Watch Ultra (2025) version may differ.

Samsung
Battery325 mAh typical; up to 30 hours with always-on display, up to 48 hours with Battery Saver

The 45 mm model has a 455 mAh battery and up to 40 hours with the always-on display.

Google		—
ChargingQuick Charge Dock: about 50% in 15 minutes, 80% in 25 minutes, 100% in 45 minutes

The watch sits in a new side-mounted dock; earlier Pixel Watch chargers do not fit this model.

Google		—
SensorsOptical heart rate, SpO2 (red/infrared), ECG-capable electrical sensors, skin conductance (cEDA), skin temperature, compass, altimeter, barometer, accelerometer, gyroscope, ambient light

ECG and some health features may be limited by country; readings are not a medical diagnosis.

Google		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
LocationDual-frequency GPS (GPS, Galileo, GLONASS) Google—
ConnectivityBluetooth 6.0; Wi-Fi 802.11 a/b/g/n/ac/ax (2.4 and 5 GHz); NFC; UWB

This entry covers the Wi-Fi model; LTE and UMTS cellular connectivity is only on the LTE model.

Google		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
Durability5 ATM; IP68

5 ATM suits shallow-water activities like swimming, not diving or high-speed water sports.

Google		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
ControlsSide button, haptic crown; Gen 3 Premium haptics Google—
AudioBuilt-in microphone and speaker Google—
Operating systemWear OS 6.0 GoogleWear 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
CompatibilityAndroid 11.0 or newer; Google Account and Pixel Watch app

Some features depend on the phone's Android version and the Pixel Watch app.

Google		—
Band fitSmall 130–175 mm, Large 165–210 mm wrist Google—
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
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