Samsung Galaxy Watch Ultra2 (47 mm, LTE) / Apple Watch Series 6 (40 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 6 (40 mm, GPS): Apple Watch Series 6, 40 mm aluminium case, GPS (2020). The 44 mm and GPS + Cellular versions, stainless steel/titanium cases and the Nike and Hermès editions are separate.

Specification	Samsung Galaxy Watch Ultra2 (47 mm, LTE)	Apple Watch Series 6 (40 mm, GPS)
Release year	2026	2020
Availability	From 7 August 2026 in 106 markets Samsung	—
Display	1.5-inch (38.5 mm) Super AMOLED; 498 × 498 Samsung	Always-On Retina LTPO OLED; 324 × 394 pixels, 759 mm² display area; 1000 nits The Always-On display keeps the time and complications visible with the wrist down. Apple
Brightness	Up to 5,000 nits This is peak brightness aimed at readability in sunlight, not sustained full-screen brightness. Samsung	—
Case	47 mm; titanium on the front and back cover areas, plastic and other materials elsewhere in the frame Samsung	—
Processor	Snapdragon Wear Elite; 5 cores (2.1 and 1.95 GHz) Samsung	—
Memory and storage	2 GB RAM; 64 GB (49.3 GB available) Samsung	—
Battery	800 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	—
Charging	Fast charging up to about 40% in 30 minutes Samsung	—
Operating system	Wear OS 7; security updates until 31 July 2031 Samsung	—
Wireless	Bluetooth 6.0; Wi-Fi 802.11a/b/g/n (2.4 and 5 GHz); NFC Samsung	Wi‑Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.0 LTE and UMTS are only on GPS + Cellular models. Apple
Cellular	4G 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	—
Location	GPS, 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	—
Sensors	Optical 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	—
Durability	10 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	—
Buttons and siren	Three 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 weight	47.4 × 47.1 × 10.7 mm; 61.5 g Samsung	40 × 34 × 10.7 mm; 30.5 g (aluminium, without band) Apple
Phone compatibility	Android 13 or later phone with at least 1.5 GB of memory Pairing with an iPhone is not supported. Samsung	—
Case and version	—	40 mm aluminium case, GPS; Silver, Space Gray, Gold, Blue, (PRODUCT)RED Stainless steel and titanium cases were only sold in the GPS + Cellular version. The 44 mm model uses the same chip but has a different display and weight. Apple
Water resistance	—	50 metres (ISO 22810:2010) Suitable for shallow-water swimming in a pool or the sea, but not scuba diving, waterskiing or high-velocity water. Apple
Chip	—	S6 SiP with 64-bit dual-core processor; W3 wireless chip; U1 Ultra Wideband chip Ultra Wideband availability varies by region. Apple
Storage	—	32 GB Apple
Health sensors	—	Blood oxygen sensor (Blood Oxygen app), electrical heart sensor (ECG app), third-generation optical heart sensor Apple states Blood Oxygen measurements are not for medical use and are only designed for general fitness and wellness. The ECG app is not intended for people under 22. Apple
Other sensors and safety	—	Always-on altimeter, compass, accelerometer up to 32 g with fall detection, gyroscope, ambient light sensor; Emergency SOS On the GPS model, Emergency SOS needs the iPhone nearby; otherwise the watch must be on a known Wi‑Fi network with Wi‑Fi Calling on. International emergency calling is only on the cellular model. Apple
Battery and charging	—	Built-in lithium-ion battery; up to 18 hours; magnetic charging cable (1 m) The 18-hour figure comes from Apple’s August 2020 testing with pre-production watches paired to an iPhone; it varies with use. Apple
Other	—	Speaker, microphone, Apple Pay, GymKit; ceramic and sapphire crystal back Apple
Compatibility	—	Requires an iPhone 6s or later with iOS 14 or later Apple