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Google Pixel Watch 4 vs Samsung Galaxy Watch Ultra2

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

GooglePixel Watch 4SamsungGalaxy Watch Ultra2
Overview
ReleasedOctober 2025August 2026
Display
Case sizes41 mm or 45 mm47 mm
PanelLTPO OLEDOLED
Peak brightness3,000 nits5,000 nits
Always-on displayYesYes
Display detailActua 360 domed AMOLED LTPO display; 320 ppi; DCI-P3 colour; 1–60 Hz; 1 nit minimum brightness (always-on display)Super AMOLED with full-colour Always On Display; 1.52-inch (38.5 mm) with 498 x 498 pixels; 16M colours; 5,000 nits is the localised peak under high ambient light
Screen protectionCustom 3D Corning Gorilla Glass 5Sapphire Crystal
Health and fitness
ECGYesYes
Blood oxygenYesYes
Skin temperatureYesYes
Sleep apnoea alertsNoYes
High blood pressure alertsNoNo
Body compositionNoYes
Fall detectionYesYes
Crash detectionYesNo
GPSDual-band (L1 and L5)Dual-band (L1 and L5)
Water resistance50 m100 m
SensorsMulti-path optical heart rate sensor; multipurpose electrical sensors for the ECG app; red and infrared sensors for SpO2; far-field skin temperature sensor; electrical sensor for skin conductance (cEDA); compass; altimeter; barometer; magnetometer; 3-axis accelerometer; gyroscope; ambient light sensorSamsung BioActive Sensor (optical bio-signal sensor, electrical heart signal sensor and bioelectrical impedance analysis sensor); temperature sensor; accelerometer; barometer; gyro sensor; geomagnetic sensor; light sensor
Health featuresECG app and irregular heart rhythm notifications; SpO2, breathing rate, resting heart rate and skin temperature trends; sleep and stress tracking; body response tracking (cEDA)ECG with Irregular Heart Rhythm Notification, blood pressure (calibrated against an arm cuff every 4 weeks) and sleep apnoea detection in the Samsung Health Monitor app, which needs a Galaxy phone; Vitals (heart rate, heart rate variability, respiratory rate, skin temperature and blood oxygen during sleep, against a personal baseline); Heart Health Score; Vascular Load; Antioxidant Index; AGEs Index; Energy Score; sleep tracking, Sleep Coaching and Bedtime Guidance; body composition; High Stress Alert; Cycle Tracking; Hearing, with alerts for unsafe noise levels
Fitness featuresDual-frequency GPS; workout tracking with real-time guidance; Google Health Coach with a Google Health Premium subscriptionTrail Run with GPX routes, turn-by-turn navigation, Climb Guidance and Water Intake Alarm; Depth app for depth, dive time and water temperature to 40 m; direct connection to cycling power, speed and cadence sensors; Track Back; Running Coach; Fitness Index; Daily Cardio Load; Personalised Heart Rate Zone; Personalised Functional Threshold Power; Strava and iFIT apps
Safety featuresEmergency SOS; Fall Detection; Car Crash Detection; Loss of Pulse Detection; Safety Check; Emergency Sharing; Satellite SOS on LTE models in supported countries, including the UKEmergency SOS (five presses of the home button); Fall Detection; 86 dB siren heard up to 180 m (hold the orange Quick Button for 5 seconds)
Battery and connections
Battery life (maker's claim)Up to 40 hoursUp to 60 hours
In low-power modeUp to 3 days–
Mobile data optionYesYes
Works withAndroidAndroid
ChipSnapdragon W5 Gen 2Snapdragon Wear Elite
Storage32 GB64 GB
Battery life detail41mm up to 30 hours with always-on display and 48 hours in Battery Saver mode (325 mAh); 45mm up to 40 hours and 72 hours in Battery Saver mode (455 mAh)Up to 60 hours with Always On Display on and up to 80 hours with it off; GPS up to 20 hours and GPX route navigation up to 16 hours with power saving mode (Standard) on during exercise; 800 mAh typical capacity
ChargingQuick Charge Dock (USB-C) in the box; 41mm about 15 minutes to 50%, 25 minutes to 80% and 45 minutes to 100%; 45mm about 15 minutes to 50%, 30 minutes to 80% and 60 minutes to 100%High-Frequency Fast Charging (WPC-based wireless charging) to 40% in about 30 minutes with the Fast Wireless Charger (EP-OL715) in the box and a 5 V / 2 A PD adapter
Connectivity4G LTE and UMTS (LTE models); Bluetooth 6.0; Wi-Fi 802.11 a/b/g/n/ac/ax at 2.4GHz and 5GHz; NFC; Ultra-wideband; dual-frequency GPS (GPS, Galileo, GLONASS, BeiDou and QZSS in the UK); works with most phones on Android 11 or newerLTE with eSIM (4G LTE and 3G); Bluetooth 6.0; Wi-Fi 802.11a/b/g/n at 2.4 GHz and 5 GHz; NFC; L1 + L5 dual-frequency GPS with Glonass, Beidou, Galileo and QZSS; pairs with Android 13 or later phones with more than 1.5 GB of memory
Storage32 GB eMMC flash; 2 GB SDRAM2 GB memory; 64 GB storage (49.3 GB available)
Design
Weight (lightest version)31 g61.5 g
SoftwareWear OSWear OS
Case materials100% recycled aluminium housing; 5 ATM and IP68Titanium case (titanium on the front and back cover areas of the frame, the rest of the frame is plastic and other materials); Sapphire Crystal; 10ATM (100 m, ISO 22810, tested in salt and chlorinated water), IP68 and IP69K; EN13319; MIL-STD-810H; works on the wrist from -20°C to 55°C
Size41mm is 41 mm across and 12.3 mm high, 31 g without band; 45mm is 45 mm across and 12.3 mm high, 36.7 g without band47.4 x 47.1 x 10.7 mm; 61.5 g (watch body without band)
BandsActive Band in fluoroelastomer with soft-touch coating, small and large included; 41mm fits 130–210 mm wrists, 45mm fits 150–215 mm wristsMarine Band (S/M/L) in the box, with an Air Pocket inner surface; PeakForm Band and Trail Band sold separately
Colours41mm in Polished Silver with Iris or Porcelain band, Champagne Gold with Lemongrass and Matte Black with Obsidian; 45mm in Polished Silver with Porcelain, Satin Moonstone with Moonstone and Matte Black with ObsidianTitanium Silver, Titanium Grey
In the boxPixel Watch 4, Active Band in small and large, Quick Charge Dock, quick start guideGalaxy Watch Ultra2, Marine Band, Fast Wireless Charger

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