Samsung Galaxy Watch Ultra2 (47 mm, LTE) / Apple Watch Series 8 (45 mm, GPS)

Samsung Galaxy Watch Ultra2 (47 mm, LTE): SM-L715 · 47mm titanium case, LTE; Titanium Silver and Titanium Gray. The US version is SM-L715U and the European/Australian version SM-L715F; LTE bands vary by country.

Apple Watch Series 8 (45 mm, GPS): Apple Watch Series 8, 45 mm aluminium case, GPS model. The 41 mm case, GPS + Cellular and stainless steel versions are separate models; weight and screen size differ.

SpecificationSamsung Galaxy Watch Ultra2 (47 mm, LTE)Apple Watch Series 8 (45 mm, GPS)
Release year20262022
AvailabilityFrom 7 August 2026 in 106 markets Samsung—
Display1.5-inch (38.5 mm) Super AMOLED; 498 × 498 SamsungAlways-On Retina LTPO OLED; 396 × 484 pixels; 1143 sq mm display area; up to 1000 nits

The LTPO panel can lower its refresh rate a lot, so the screen stays on dimmed when the wrist is down.

Apple
BrightnessUp to 5,000 nits

This is peak brightness aimed at readability in sunlight, not sustained full-screen brightness.

Samsung		—
Case47 mm; titanium on the front and back cover areas, plastic and other materials elsewhere in the frame Samsung—
ProcessorSnapdragon Wear Elite; 5 cores (2.1 and 1.95 GHz) Samsung—
Memory and storage2 GB RAM; 64 GB (49.3 GB available) Samsung—
Battery800 mAh typical; up to 60 hours with AOD on, 80 hours with it off

AOD (always-on display) lets you read the watch without raising your wrist but cuts battery life by roughly a quarter.

Samsung		—
ChargingFast charging up to about 40% in 30 minutes Samsung—
Operating systemWear OS 7; security updates until 31 July 2031 Samsung—
WirelessBluetooth 6.0; Wi-Fi 802.11a/b/g/n (2.4 and 5 GHz); NFC Samsung—
Cellular4G LTE (FDD/TDD), 3G WCDMA; eSIM

LTE use depends on country and carrier support; the watch can make calls and use data without a phone.

Samsung		—
LocationGPS, GLONASS, BeiDou, Galileo, QZSS; dual-frequency (L1+L5) GPS

Receiving L1 and L5 together reduces errors caused by reflected signals near tall buildings and under trees.

Samsung		L1 GPS, GLONASS, Galileo, QZSS and BeiDou; compass; always-on altimeter

This is single-frequency (L1) GPS; drift between tall buildings can be higher than on dual-frequency models.

Apple
SensorsOptical heart rate, electrical heart (ECG), BIA, temperature, accelerometer, gyro, barometer, geomagnetic, light

BIA estimates body composition using a weak current through the wrist; ECG readings use the electrical heart sensor.

Samsung		—
Durability10 ATM; IP69K; EN13319; MIL-STD-810H

Samsung lists 100 m water resistance under ISO 22810 and operation between −20 and 55 °C while worn. EN13319 is a diving equipment standard.

Samsung		Water resistant to 50 metres under ISO 22810:2010; IP6X dust; ceramic and sapphire crystal back

Suitable for shallow-water activities in a pool or the sea; not for scuba diving, waterskiing or high-velocity water.

Apple
Buttons and sirenThree buttons and an orange Quick Button; holding it for 5 seconds sounds an 86 dB siren (audible up to 180 m)

Pressing the home button five times starts an emergency SOS.

Samsung		—
Size and weight47.4 × 47.1 × 10.7 mm; 61.5 g Samsung45 × 38 × 10.7 mm; aluminium GPS: 38.8 g Apple
Phone compatibilityAndroid 13 or later phone with at least 1.5 GB of memory

Pairing with an iPhone is not supported.

Samsung		—
Chip—S8 SiP with 64-bit dual-core processor; W3 wireless chip; U1 (Ultra Wideband)

Ultra Wideband is used for close-range location with an iPhone; availability varies by region.

Apple
Health sensors—Blood oxygen sensor; electrical heart sensor (ECG app); third-generation optical heart sensor

The Blood Oxygen app is not for medical use. The ECG app is not intended for people under 22 and may not be available in every country.

Apple
Motion and safety—High-g accelerometer up to 256 g (Fall Detection and Crash Detection); high dynamic range gyroscope; Emergency SOS; international emergency calling

On the GPS model, Emergency SOS needs a nearby iPhone or Wi-Fi Calling; international emergency calling works only on cellular models.

Apple
Connectivity—Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.3 Apple
Storage—32 GB Apple
Battery and charging—Up to 18 hours; built-in lithium-ion battery; USB-C magnetic fast charging cable

Apple’s 18-hour figure is based on 90 time checks, 90 notifications, 45 minutes of app use and a 60-minute workout with music; sleep tracking is not part of that scenario.

Apple
Compatibility—Requires iPhone 8 or later with iOS 16 or later

It cannot be used with Android phones.

Apple
Colours—Aluminium: Midnight, Starlight, Silver, (PRODUCT)RED Apple