Apple Watch Series 9 (45 mm, GPS, aluminium) / Samsung Galaxy Watch5 Pro (45 mm)

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.

Samsung Galaxy Watch5 Pro (45 mm): The Galaxy Watch5 Pro comes in one size (45 mm): SM-R920 (Bluetooth) and SM-R925 (LTE), in Black Titanium and Gray Titanium. The 40/44 mm Galaxy Watch5 is a separate model with a different battery, case material and display size.

Specification	Apple Watch Series 9 (45 mm, GPS, aluminium)	Samsung Galaxy Watch5 Pro (45 mm)
Release year	2023	2022
Display	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	1.4-inch (34.6 mm) 450 × 450 Super AMOLED; full-colour Always On Display The bezel is raised above the display, which Samsung designs to protect the glass from knocks. There is no rotating bezel; menus are navigated with touch gestures and the buttons. Samsung
Chip	S9 SiP; 64-bit dual-core processor, 4-core Neural Engine Apple	—
Storage	64 GB Apple	—
Controls	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	—
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	—
Location	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	—
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	590 mAh (typical); WPC-based wireless faster charging Samsung says real battery life varies with network environment and usage patterns. 590 mAh is about 44% larger than the 410 mAh battery in the 44 mm Galaxy Watch5. Samsung
Durability	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	5ATM + IP68 / MIL-STD-810H 5ATM covers surface water use such as swimming, not diving or high-pressure water. MIL-STD-810H is the US military standard for environmental test methods. Samsung
Size and weight	45 × 38 × 10.7 mm; 38.7 g; fits 140–245 mm wrists Apple	45.4 × 45.4 × 10.5 mm; 46.5 g Dimensions are measured without the health sensors and weight without the strap. Samsung
Compatibility	iPhone XS or later with iOS 17 or later It cannot be used with Android phones. Apple	—
Glass and case	—	Sapphire Crystal; titanium case with D-Buckle Sport Band The D-buckle band folds open; because the watch cannot lie flat, it is charged on its side on the Samsung charger. Samsung
Processor	—	Exynos W920, dual-core 1.18 GHz Samsung
Memory and storage	—	1.5 GB RAM + 16 GB internal storage Samsung
Operating system	—	Wear OS 3.5 (Powered by Samsung) with One UI Watch 4.5 at launch Activation requires connecting to an Android phone with Google Mobile Services; it cannot be used with an iPhone. Samsung
Sensors	—	Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart Signal + Bioelectrical Impedance Analysis), temperature, accelerometer, barometer, gyro, geomagnetic, light sensor Electrical Heart Signal enables ECG and Bioelectrical Impedance enables body composition estimates; ECG works through the Samsung Health Monitor app only in approved markets. Samsung
Connectivity	—	Bluetooth 5.2, Wi‑Fi 802.11 a/b/g/n 2.4 + 5 GHz, NFC, GPS/Glonass/Beidou/Galileo; LTE (LTE model only) The LTE model can make calls and use data without the phone nearby; support depends on the carrier. Samsung
Phone compatibility	—	Android 8.0 or higher with more than 1.5 GB of RAM Samsung