Google Pixel Watch 5 vs Apple Watch Ultra 4

Both are 2026 watches, and on paper they share more than their prices suggest: each peaks at 3,000 nits, stores 64GB, uses dual-frequency GPS and can call for help over satellite. Then they split. Pixel Watch 5 is a round everyday watch that weighs 31.0 or 36.7 grams without a band, while Ultra 4, announced on 9 September 2026, is a 49mm titanium watch whose case alone weighs 63.0 grams.

Pixel Watch 5 and Ultra 4 side by side

Spec	Google Pixel Watch 5	Apple Watch Ultra 4
Phone needed	Android 12 or newer, not Android Go	iPhone 11 or later on iOS 27
Case	41mm or 45mm recycled aluminum, 12.3mm thick	49 × 44 × 12mm Grade 5 titanium
Weight, no band	31.0 g or 36.7 g	63.0 g natural, 63.1 g black
Screen	Domed Actua 360 AMOLED, 320 ppi, 1Hz to 60Hz; pixel count not published	Flat LTPO3 OLED, 422 × 514, 326 ppi
Glass	Gorilla Glass 5	Sapphire
Peak brightness	Up to 3,000 nits	Up to 3,000 nits
Chip and software	Snapdragon W5 Gen 2 Accelerated; Wear OS 7	S11; watchOS 27
Battery cell	332 mAh (41mm), 465 mAh (45mm)	Not published
Everyday battery	Up to 30 hours (41mm) or 40 hours (45mm) with always-on	Up to 50 hours of normal use
Power saving	Battery Saver: up to 48 or 72 hours	Low Power Mode: up to 84 hours
GPS workouts	Not published	18 hours; 25 Extended; 45 Max Extended
Satellite	Satellite SOS	Emergency SOS, Messages and Find My
Water	5 ATM and IP68	100m; EN 13319 dives to 40m
US starting price	$399.99	$799

Ultra 4 is the bigger, tougher watch

Ultra 4’s Grade 5 titanium is 100 percent recycled, Apple says, and the case fits wrists from 130mm to 210mm. One band comes in the box, from the 2026 lineup of Trail Loop, Alpine Loop and a translucent Ocean Band, and which one you get depends on the configuration. Hermès Ultra 4 is a separate collection.

Pixel Watch 5’s case is recycled aluminum, though Google’s footnote says recycled aluminum is at least 3 percent of the product’s weight. Even the 45mm Pixel is far lighter on the wrist than the Ultra. The 45mm skips the Canyon color the 41mm offers, and a US-only Stephen Curry edition comes in Satin Pyrite with a Rye loop.

The Ultra’s extra hardware is for the outdoors. It’s water resistant to 100 meters under ISO 22810, with a depth gauge certified to EN 13319 for dives to 40 meters, accurate to plus or minus 1 meter, and a water-temperature sensor; dive apps can open automatically at 1 meter. It’s IP6X dust-rated and tested against a specific list of MIL-STD-810H methods rather than a blanket “military grade”, and Apple rates it for minus 20 to 55 degrees Celsius on the wrist and altitudes from minus 500 to 9,000 meters. The Action Button starts a workout, marks a segment or turns on the flashlight, and holding it sounds a siren that Apple says carries about 180 meters.

Pixel Watch 5 has no Action Button or siren, and it’s rated 5 ATM and IP68 as it leaves the factory. Google says it isn’t waterproof, that its water resistance can fade, and that high-speed or hot water is out. Its safety list is Fall Detection, Car Crash Detection, Safety Check, Location Sharing and Loss of Pulse. Ultra 4 has Fall Detection and Crash Detection too, so the alerts aren’t the difference; the siren, the 40-meter gauge and satellite messaging are.

Same 3,000-nit peak, different glass

Both screens peak at 3,000 nits and dim to 1 nit. Ultra 4’s Always-On LTPO3 OLED sits under flat sapphire, at 422 × 514 pixels and 326 pixels per inch across 1,245 square millimeters, and Night Mode works on three of its Ultra faces. Pixel Watch 5’s Actua 360 AMOLED is domed, at 320 pixels per inch under Gorilla Glass 5, and refreshes at anywhere from 1Hz to 60Hz. Brightness isn’t a reason to pay more for either.

Battery: compare the modes, not just the hours

Ultra 4 is rated for up to 50 hours of normal use and 84 in Low Power Mode, and it has GPS workout ratings: 18 hours for an outdoor workout, 25 in Extended Workout and 45 in Max Extended Workout. Apple limits that 45-hour figure to outdoor running, walking and hiking with GPS checking every second, so it isn’t a swim or dive rating. For a weekend outside with GPS on, plan around the 18, 25 or 45-hour ratings, not the 50-hour figure. The Magnetic Fast Charger in the box reaches about 80 percent in 45 minutes, and Apple says 15 minutes gives up to 18 hours of normal use and 5 minutes up to 10 hours of sleep tracking.

Pixel Watch 5’s 41mm has a 332 mAh cell rated for up to 30 hours with always-on and 48 in Battery Saver; the 45mm’s 465 mAh cell is rated for 40 and 72. Google’s figures come from 2025 tests of pre-production units in California with a median user’s mix, and the “up to 40 hours” it advertises is the 45mm with always-on. Pixel Watch 5 has no GPS-workout rating to set against Ultra 4’s. On the included Quick Charge Dock, the 41mm reaches about 50 percent in 15 minutes, 80 in 25 and full in about 45, and the 45mm takes about 15, 30 and 60 minutes. Google also says 15 minutes can add up to 15 hours, a separate claim from those dock times. You supply the power adapter, at least 7.5 watts.

GPS and satellite

Both have dual-frequency GPS. Pixel Watch 5 uses GPS, Galileo and GLONASS in the US, plus BeiDou and QZSS elsewhere; Ultra 4 uses GPS, Galileo, QZSS and BeiDou, and Apple’s list leaves out GLONASS. Each company praises its own accuracy, and there’s no head-to-head test to settle it.

Satellite is where Ultra 4 pulls ahead. Pixel Watch 5’s Satellite SOS reaches emergency services, included for two years after activation where Google offers it. Ultra 4 has Emergency SOS too, plus Messages and Find My over satellite, so you can text a person rather than only emergency services.

Health and training

Ultra 4 has Apple’s Health Sensing System, which Apple says checks your heart rate in the background every five seconds and heart rate variability as often as every five minutes, plus a daily readiness score from 0 to 10. It tracks sleep with a Sleep score and, where Apple offers it, sleep apnea notifications. ECG, Blood Oxygen and hypertension notifications depend on your country, and none of them is a diagnosis. For training, it adds running power, and for hiking, U.S. topographic maps and curated routes in all 63 national parks.

Pixel Watch 5 has multi-path heart-rate tracking, blood oxygen, skin temperature, an ECG app in select countries for ages 22 and up, and a cEDA sensor for skin conductance. Sleep tracking includes stages, a Sleep Score and Morning Brief, and blood-pressure trends and insulin-resistance tracking were marked as coming in September 2026. Google lists more than 50 activities, but not running power or topographic maps.

Chips, connections and the phone behind them

Pixel Watch 5 runs Wear OS 7 on the Snapdragon W5 Gen 2 Accelerated with a Cortex-M55 coprocessor; Ultra 4 runs watchOS 27 on Apple’s S11. Both have 64GB of storage. Pixel Watch 5 has Bluetooth 6.0 and Wi-Fi 6, and its LTE models use 4G LTE and UMTS. Ultra 4, model A3579, has 5G RedCap, Wi-Fi 4 and Bluetooth 5.3.

Ultra 4 needs an iPhone 11 or later, including iPhone SE (2nd generation or later), on iOS 27, and its cellular and satellite features depend on that paired iPhone. Pixel Watch 5 needs a phone on Android 12.0 or newer, not Android Go, with a Google Account and the Pixel Watch app. Gemini, Google Wallet and Wear OS 7 don’t follow you to an iPhone, and Apple Pay, GymKit and the Health Sensing System don’t follow you to Android.

What they cost

Pixel Watch 5 starts at $399.99 for the 41mm on the US Google Store. LTE and the 45mm cost more, carrier pages have shown $529.99 for a 45mm with LTE, and Google doesn’t print a full price list. Ultra 4 has started at $799 since 9 September 2026, before bands, Hermès, a cellular plan or AppleCare; Apple’s example of $24.99 a month is financing on that $799 watch, not a cheaper price. The extra money buys the titanium case, the dive gear, satellite messaging and the longer battery, not a brighter screen. LTE models, cellular plans and bands all change what you pay, so compare the exact versions on the Google Store and apple.com before you buy.