Shape Square Round Round Round Square Round Rectangular Watch size 42mm, 46mm 41mm, 45mm 47mm 40mm, 44mm 49mm 41mm, 45mm 40mm, 44mm Materials, finishes Aluminum, titanium Aluminium Titanium bezel, stainless steel case, sapphire crystal glass Aluminum Titanium Stainless steel Aluminum, Midnight, Starlight, Silver Display size, resolution 42mm: 1.65-inch OLED 446 x 374 pixels; 46mm: 1.81-inch 496 x 416 pixels 41mm: 1.61-inch 320 ppi, AMOLED; 45mm: 1.77-inch 320ppi AMOLED 47mm: 1.50-inch LTPO AMOLED, 466 x 466 pixels 40mm: 1.3-inch Super AMOLED 432 x 432; 44mm: 1.5-inch Super AMOLED 480 x 480 1.91-inch, 502 x 410-pixel OLED 1.4-inch, 454 x 454-pixel AMOLED 40mm: 324 x 394, 44mm: 368 x 448 Dimensions 42mm: 42 x 36 x 9.7mm; 46mm: 46 x 39 x 9.7mm 41mm: 41 x 41 x 12.3 mm; 45mm: 45 x 45 x 12.3 mm 46.6 (excluding lugs) x 48 x 11.8mm (excluding sensor area) 40mm: 40.4 x 40.4 x 9.7; 44mm: 44.4 x 44.4 x 9.7 mm 44mm x 49mm x 14.4mm 45mm: 45 x 45 x 12 mm 40mm: 40 x 34 x 10.7 mm, 44mm: 44 x 38 x 10.7 mm Weight 42mm (Wi-Fi): 30 g; 42mm (cellular): 29.3 g; 42mm (titanium): 34.4 g; 46mm (Wi-Fi): 36.4 g; 46mm (cellular): 35.3 g; 46mm (titanium): 41.7 g 41mm: 31g; 45mm: 37g ~80g with strap 40mm: 28.8g; 44mm: 33.8g 61.4g 30g 40mm GPS: 26.4g, 40mm Cellular: 27.8g, 44mm GPS: 32.9g, 44mm Cellular: 33g Colors Jet black, rose gold, silver; titanium: slate, gold, natural Matte black, polished silver, matte hazel, Champagne gold Obsidian Titanium, Emerald Titanium Green, cream Natural titanium Whitestone/silver, black/slate Midnight, Starlight, Silver Always On Yes Yes Yes (LTPO enables low-power AOD) Yes Yes Yes No Interchangeable bands Yes Yes Yes (22mm standard) Yes Yes Yes Yes GPS Yes Yes Yes (Dual-band L1 + L5) Yes Yes (L1 and L5) Yes Yes Automatic workout detection Yes Yes Yes Yes Yes Yes Yes Compass Yes Yes Yes Yes Yes Yes Yes Altimeter Yes Yes Yes Yes Yes (operating range: -500m to 9,000m) Yes Always-on altimeter Water/Dust resistance Water resistant up to 50m (5ATM), IP6X (dust) Water resistant up to 50m (5ATM), IP6X (dust) Water resistant up to 50m (5ATM), IP6X (dust) Water resistant up to 50m (5ATM), IP6X (dust) 10ATM (100 meters) and recreational scuba diving up to 40 meters 5ATM Water resistant up to 50m (5ATM) Calls Yes Yes Yes Yes Yes Yes Yes (Cellular only) Microphone Yes Yes Yes Yes Yes (3-mic array) Yes Yes Speaker Yes Yes Yes Yes Yes Yes Yes Voice assistant Yes (Siri) Yes (Google Assistant) Yes (Google Assistant) Yes (Google Assistant, Bixby) Yes (Siri, on-device) Yes Siri Mobile Payments Yes (Apple Pay) Yes (Google Wallet) Yes (Google Wallet) Yes (Samsung Wallet, Google Wallet) Yes (Apple Pay) Yes (Garmin Pay) Ys (Apple Pay) Sleep tracking Yes Yes Yes (with advanced metrics and breathing rate) Yes Yes Yes Yes Period tracking Yes Yes Yes Yes Yes Yes Yes Sensors Accelerometer, altimeter, gyro sensor, temperature sensor, compass, third-gen optical heart sensor, electrical heart sensor, ambient light sensor, depth gauge, water temperature sensor SpO2, ECG, accelerometer, gyro, ambient light sensor, skin temperature sensor, barometer, magnetometer Optical heart rate, SpO2, skin temperature, accelerometer, gyroscope, barometer, compass, ECG, BIA Accelerometer, barometer, bioelectrical impedance analysis sensor, electrical heart sensor, gyro sensor, geomagnetic sensor, infrared temperature sensor, light sensor, optical heart rate sensor SPo2 (blood oxygen), ECG, optical heart, ambient light, high dynamic range gyroscope, high-g accelerometer, water temperature, depth gauge + app Second-gen optical heart sensor, accelerometer, High dynamic range gyroscope, Compass, Always-on altimeter, Ambient light sensor Emergency features Fall detection, crash detection, Emergency SOS, international emergency calling, noise monitoring, Backtrack Safety Signal, Safety Check Fall detection, emergency SOS Fall detection, emergency SOS International emergency calling, Emergency SOS, crash detection Incident detection, live track Emergency SOS, International emergency calling, Crash Detection, Fall Detection, Noise monitoring, Backtrack Compatibility iOS 18 and newer Android 10 and newer Android only Android 11 and newer iOS 17 iOS and Android iPhone 8 or later with iOS 16 and newer Software WatchOS 11 WearOS 5 Wear OS 5 WearOS 5 WatchOS 10 Not disclosed WatchOS 11 Processor S10 SiP with 64‑bit dual core processor, 4‑core Neural Engine Qualcomm SW5100 Snapdragon W5 Gen 1 + BES2800BP (dual chip architecture) Exynos W1000 Apple S9 Not disclosed S8 SiP, 64-bit dual-core, 2-core Neural Engine Connectivity Bluetooth 5.3, 2nd gen Ultra Wideband chip Bluetooth 5.0, ultrawideband Bluetooth 5.2, Wi-Fi, NFC, GPS Bluetooth 5.3, NFC LTE and UMTS, Wi-Fi 4, Bluetooth 5.3 Bluetooth, ANT+, Wi-Fi Bluetooth 5.3, LTE/UMTS (Cellular model) Memory and storage 64GB 2GB memory + 32GB storage 2GB memory / 32GB storage 2GB memory + 32GB storage 64GB 8GB 32GB Charging USB-C fast charging cable USB-C fast charging cable USB-C Fast wired (up to 7.5W) USB-C fast charging cable USB-C magnetic fast charging Garmin proprietary plug charger Magnetic charging cable, 80% in ~1.5 hours Battery life Up to 18 hours normal use; up to 36 hours in low power mode 24 hours with always-on display 3+ days (always on and heavy use), Up to 5 days (raise to wake/smart mode), 16 days (power saver mode) Up to 30 hours (AOD on); up to 40 hours (AOD off) Up to 36 hours; up to 72 hours (low power mode) Up to 14 days Up to 18 hours Battery capacity Wi-Fi 4 (802.11n) 41mm: 306 mAh; 45mm: 420 mAh 631 mAh 40mm: 300 mAh; 44mm: 425mAh Unavailable Not specified US price 42mm: $399 (Wi-Fi); 42mm: $499 (cellular); 42mm: $699 (titanium); 46mm: $429 (Wi-Fi); 46mm: $529 (cellular); 46mm: $749 (titanium) $350 (Wi-Fi, 41mm), $400 (Wi-Fi, 45mm), $450 (Wi-Fi + LTE, 41mm), $500 (Wi-Fi + LTE, 45mm) $350 40mm: $299 (Wi-Fi/Bluetooth)
40mm: $349 (LTE)
44mm: $329 (Wi-Fi/Bluetooth)
44mm: $379 (LTE) $799 $450 40mm GPS: $249, 44mm GPS: $279
40mm GPS + Cellular: $299, 44mm GPS + Cellular: $329 UK price 42mm: £399 (Wi-Fi); 42mm: £499 (cellular); 42mm: £699 (titanium); 46mm: £429 (Wi-Fi); 46mm: £529 (cellular); 46mm: £749 (titanium) £349 (Wi-Fi, 41mm), £399 (Wi-Fi, 45mm), £449 (Wi-Fi + LTE, 41mm), £499 (Wi-Fi + LTE, 45mm) £299 £799 £450 40mm GPS: £219, 44mm GPS: £249, 40mm GPS + Cellular: £269, 44mm GPS + Cellular: £299 Australian price 42mm: AU$649 (Wi-Fi); 42mm: AU$809 (cellular); 42mm: AU$1,199 (titanium); 46mm: AU$699 (Wi-Fi/Bluetooth); 46mm: AU$859 (cellular); 46mm: AU$1,279 (titanium) AU$579 (Wi-Fi, 41mm), AU$669 (Wi-Fi, 45mm), AU$749 (Wi-Fi + LTE, 41mm), AU$839 (Wi-Fi + LTE, 45mm) Not available AU$1,399 AU$749 40mm GPS: A$399, 44mm GPS: A$449, 40mm GPS + Cellular: A$479, 44mm GPS + Cellular: A$529