Apple Watch Ultra 4 / Google Pixel Watch 4 (41 mm, Wi-Fi)

Apple Watch Ultra 4: A3579; 49 mm natural titanium; translucent gray Ocean Band

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

Specification	Apple Watch Ultra 4	Google Pixel Watch 4 (41 mm, Wi-Fi)
Release year	2026	2025
Announcement / availability	9 / 18 September 2026 Apple	—
Case	Grade 5 titanium; sapphire front crystal Apple	41 mm, 100% recycled aluminium; 12.3 mm height Google
Size	49 × 44 × 12 mm Apple	—
Weight	Natural titanium case 63 g Apple	31.0 g (without band) The 45 mm model weighs 36.7 g. Google
Display	LTPO3 OLED; 422 × 514 Apple	Curved Actua 360 AMOLED LTPO; 320 ppi; DCI-P3; always-on display GIGAZINE gives the 41 mm model's resolution as 426 × 426. Google
Brightness	1 nit minimum; 3000 nits peak Apple	—
Chip	S11; dual-core 64-bit Apple	—
Storage	64 GB Apple	—
Health sensors	Electrical/optical heart; blood oxygen; temperature Apple	—
Outdoor sensors	Depth, water temperature, compass, altimeter Apple	—
Positioning	Precision dual-frequency GNSS Apple	—
Wireless	Wi-Fi 4, 2.4/5 GHz; Bluetooth 5.3; UWB Apple	—
Cellular	A3579: 5G RedCap and LTE Apple	—
Manufacturer battery test	Up to 50 hours normal use; 84 in Low Power Mode Apple	—
Charging	About 45 minutes to 80% Apple	Quick 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
Water / dust	100 m rating; IP6X Apple	—
Diving limit	Recreational diving to 40 m Apple	—
Phone compatibility	iPhone 11 / SE 2 or later; iOS 27+ Apple	—
Brightness and refresh	—	Up 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 glass	—	Custom 3D Corning Gorilla Glass 5 Google
Processor	—	Qualcomm 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
Memory and storage	—	2 GB SDRAM; 32 GB eMMC Google
Battery	—	325 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
Sensors	—	Optical 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
Location	—	Dual-frequency GPS (GPS, Galileo, GLONASS) Google
Connectivity	—	Bluetooth 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
Durability	—	5 ATM; IP68 5 ATM suits shallow-water activities like swimming, not diving or high-speed water sports. Google
Controls	—	Side button, haptic crown; Gen 3 Premium haptics Google
Audio	—	Built-in microphone and speaker Google
Operating system	—	Wear OS 6.0 Google
Compatibility	—	Android 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 fit	—	Small 130–175 mm, Large 165–210 mm wrist Google