| Shape |
Round |
Square |
| Watch size |
40mm, 44mm |
41mm, 45mm |
| Materials/ Finishes |
Aluminum |
Aluminum, Stainless steel, Ceramic, Sapphire glass |
| Display size, resolution |
40mm: 1.3-inch, 432×432 Super AMOLED; 44mm: 1.5-inch, 480×480 Super AMOLED |
41mm: 1.7-inch, 352×430 45mm: 1.9-inch, 396×484 |
| Dimensions |
40mm: 38.8 x 40.4 x 9.0 mm; 44mm: 42.8 x 44.4 x 9.0 mm |
41mm: 41 x 35 x 10.7mm 45mm: 45 x 38 x 10.7mm |
| Weight |
40mm: 28.7g; 44mm: 33.3g |
41mm: 31.9g (aluminum, GPS) 45mm: 38.8g (aluminum, GPS) |
| Colors |
40mm: Graphite, Gold; 44mm: Graphite, Silver |
Midnight, Starlight, Silver, Red |
| Always On |
Yes |
Yes |
| Interchangable bands |
Yes |
Yes |
| GPS |
Yes |
Yes |
| Automatic workout detection |
Yes (running, walking, rowing) |
Yes |
| Compass |
Yes |
Yes |
| Altimeter |
Yes |
Yes |
| Water resistance |
5ATM, IP68 |
50 meters |
| Calls |
Yes |
Yes |
| Microphone |
Yes |
Yes |
| Speaker |
Yes |
Yes |
| Voice assistant |
Yes (Google Assistant, Bixby) |
Siri |
| Mobile Payments |
Yes (Samsung Wallet) |
Yes (Apple Pay) |
| Sleep tracking |
Yes |
Yes |
| Period tracking |
Yes |
Yes |
| Sensors |
Optical Heart Rate + Electrical Heart Signal + Bioelectrical Impedance Analysis, Temperature Sensor, Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor |
Electrical heart sensor, Blood oxygen sensor, accelerometer, gyroscope, light sensor, |
| Emergency features |
Emergency SOS, fall detection |
Emergency SOS, fall and crash detection |
| Compatibility |
Android 10 and above |
iOS |
| Software |
WearOS 4 |
Watch OS 9 |
| Processor |
Exynos W930 Dual-Core 1.4GHz |
Apple S8 |
| Connectivity |
LTE6, Bluetooth 5.3, Wi-Fi 2.4+5GHz, NFC, GPS/Glonass/Beidou/Galileo |
LTE, UMTS, Wi-Fi 2.4+5GHz, Bluetooth 5.3, NFC, GPS/Glonass, Galileo, QZSS, BeiDou |
| Memory and storage |
2GB memory + 16GB storage |
1GB memory + 32GB storage |
| Power |
Faster wireless charging over USB-C |
Faster wireless charging over USB-C |
| Battery life |
Up to 40 hours (Always On Display off) / Up to 30 hours (Always On Display on) |
Up to 18 hours |
| Battery capacity |
40mm: 300 mAh; 44mm: 425 mAh |
308 mAh |
| US price |
40mm: $300 (Wi-Fi, Bluetooth); 44mm: $330 (Wi-Fi, Bluetooth) |
41mm: $399 (GPS, Wi-Fi, Bluetooth) 45mm: $429 (GPS, Wi-Fi, Bluetooth) |
| UK price |
From £289 |
From £419 |
| Australian price |
From AU$549 |
From AU$629 |
