Google Pixel Watch 4 (41 mm, Wi-Fi) / Apple Watch Series 9 (45 mm, GPS, aluminium)

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

Apple Watch Series 9 (45 mm, GPS, aluminium): 45 mm aluminium case, GPS model; Pink, Midnight, Starlight, Silver and (PRODUCT)RED. The 41 mm, GPS + Cellular and stainless steel (sapphire crystal) versions differ in size and materials.

Specification	Google Pixel Watch 4 (41 mm, Wi-Fi)	Apple Watch Series 9 (45 mm, GPS, aluminium)
Release year	2025	2023
Case	41 mm, 100% recycled aluminium; 12.3 mm height Google	—
Weight	31.0 g (without band) The 45 mm model weighs 36.7 g. Google	—
Display	Curved Actua 360 AMOLED LTPO; 320 ppi; DCI-P3; always-on display GIGAZINE gives the 41 mm model's resolution as 426 × 426. Google	Always-On Retina LTPO OLED; up to 2000 nits, as low as 1 nit; 326 ppi LTPO is a panel technology that can lower the refresh rate dramatically, letting the display stay dimly on when the wrist is down. The 1-nit minimum avoids glare in a dark room. 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	—
Charging	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	—
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	L1 GPS, GNSS, Galileo and BeiDou It is a single-frequency (L1) receiver; drift in cities can be more likely than with dual-frequency watches. Apple
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	50 m water resistant (ISO 22810:2010); IP6X dust resistant; Ion-X front glass Suitable for swimming. Ion-X is the strengthened glass used on aluminium cases; steel cases use sapphire crystal. Apple
Controls	Side button, haptic crown; Gen 3 Premium haptics Google	Digital Crown with haptic feedback, side button, double tap gesture Double tap lets you answer notifications or calls by tapping the thumb and index finger of the watch hand together twice, without touching the screen. Apple
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	iPhone XS or later with iOS 17 or later It cannot be used with Android phones. Apple
Band fit	Small 130–175 mm, Large 165–210 mm wrist Google	—
Chip	—	S9 SiP; 64-bit dual-core processor, 4-core Neural Engine Apple
Storage	—	64 GB Apple
Health sensors	—	Electrical heart sensor, third-generation optical heart sensor, temperature sensing The electrical sensor is for ECG recordings; the optical sensor measures pulse with light. Temperature sensing tracks overnight changes in wrist temperature. Apple
Blood Oxygen (US)	—	On watches sold in the US without the feature, a redesigned version arrives with iOS 18.6.1 and watchOS 11.6.1; the reading is calculated on iPhone The watch collects sensor data, the paired iPhone calculates the value and shows it in the Health app. Watches bought outside the US are not affected. Apple
Other sensors	—	Compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor Apple
Wireless	—	Wi-Fi 4 (802.11n), Bluetooth 5.3, second-generation Ultra Wideband Ultra Wideband lets you locate an iPhone 15-family phone with Precision Finding showing direction and distance; availability varies by region. Apple
Battery and charging	—	Up to 18 hours normal use, up to 36 hours in Low Power Mode; fast charge to about 80% in 45 minutes Fast charging requires Apple’s fast-charging cable and a suitable adapter. Apple
Size and weight	—	45 × 38 × 10.7 mm; 38.7 g; fits 140–245 mm wrists Apple