Samsung Galaxy Watch6 (40 mm) / Apple Watch Series 6 (40 mm, GPS)

Samsung Galaxy Watch6 (40 mm): Galaxy Watch6 40 mm: SM-R930 (Bluetooth) and SM-R935 (LTE); Graphite and Gold. The 44 mm Galaxy Watch6 and the Galaxy Watch6 Classic are separate models with different displays, batteries and weights.

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.

SpecificationSamsung Galaxy Watch6 (40 mm)Apple Watch Series 6 (40 mm, GPS)
Release year20232020
Display1.3-inch (33.3 mm) 432 × 432 Super AMOLED; full-colour Always On Display

The 44 mm model has a 1.5-inch, 480 × 480 display.

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
GlassSapphire Crystal Samsung—
ProcessorExynos W930, dual-core 1.4 GHz Samsung—
Memory and storage2 GB memory + 16 GB storage Samsung—
Battery300 mAh (typical); up to 40 hours with Always On Display off, up to 30 hours with it on

According to Samsung, an 8-minute quick charge adds about 8 hours of use; charging is WPC-based wireless.

Samsung		—
Operating systemWear OS 4 (Powered by Samsung) with One UI 5 Watch at launch Samsung—
SensorsSamsung BioActive (Optical Heart Rate + Electrical Heart Signal + Bioelectrical Impedance Analysis), temperature, accelerometer, barometer, gyro, geomagnetic, light sensor

ECG and blood pressure work through the Samsung Health Monitor app only in markets where they are approved; blood pressure needs calibration with a cuff every four weeks. Body composition should not be used by people with implanted devices such as pacemakers or during pregnancy.

Samsung		—
ConnectivityBluetooth 5.3, Wi‑Fi 2.4 + 5 GHz, NFC, GPS/Glonass/Beidou/Galileo; LTE (SM-R935 only) Samsung—
Durability5ATM + IP68, MIL-STD-810H

5ATM means water resistance to 50 metres for up to 10 minutes; the watch is not suitable for diving or high-pressure water. IP68 covers 1.5 metres of fresh water for 30 minutes.

Samsung		—
Phone compatibilityAndroid 10 or higher with more than 1.5 GB of memory

Some features, such as the camera controller and health measurements, need a Galaxy phone.

Samsung		—
Size and weight38.8 × 40.4 × 9.0 mm; 28.7 g Samsung40 × 34 × 10.7 mm; 30.5 g (aluminium, without band) Apple
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
Wireless—Wi‑Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.0

LTE and UMTS are only on GPS + Cellular models.

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