Apple Watch SE 3 (44 mm, GPS) / Apple Watch Series 6 (40 mm, GPS)

Apple Watch SE 3 (44 mm, GPS): 44 mm GPS · aluminium case (Midnight / Starlight)

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.

SpecificationApple Watch SE 3 (44 mm, GPS)Apple Watch Series 6 (40 mm, GPS)
Release year20252020
AnnouncementSeptember 9, 2025; on sale from September 19, 2025 Apple—
Case44 mm aluminium; 44 × 38 × 10.7 mm

A 40 mm version also exists with different size, display and battery values.

Apple		—
Weight32.9 g (GPS) Apple—
DisplayAlways-On Retina, LTPO OLED; 368 × 448 pixels, 977 mm², 326 ppi

Because the LTPO panel can lower its refresh rate, the display keeps showing the time and notifications with the wrist down; this is the first SE with Always-On.

Apple		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
Brightness1,000 nits peak; 2 nits minimum Apple—
Front glassIon-X glass

Apple claims 4x better crack resistance than the SE 2.

Apple		—
ProcessorApple S10 SiP; 64-bit dual-core processor, 4-core Neural Engine

The S10 enables the Always-On display, double tap and wrist flick gestures, on-device Siri and fast charging.

Apple		—
Storage64 GB Apple32 GB Apple
SensorsSecond-generation optical heart sensor, temperature sensor, compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor

There is no ECG or blood oxygen sensor. The temperature sensor is not intended for medical use.

Apple		—
Health featuresHeart rate and rhythm notifications, sleep apnoea notifications, sleep stages and sleep score, cycle tracking

Feature availability varies by country.

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GesturesDouble tap; wrist flick (watchOS 26)

Wrist flick dismisses notifications and calls, silences alarms and returns to the watch face with one hand.

Apple		—
SpeakerYes; can play music and podcasts Apple—
Water resistance50 metres (ISO 22810:2010); swimproof Apple50 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
WirelessWi-Fi 4 (802.11n, 2.4 GHz only); Bluetooth 5.3 AppleWi‑Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.0

LTE and UMTS are only on GPS + Cellular models.

Apple
LocationL1 GPS, GLONASS, Galileo, QZSS, BeiDou

This is single-frequency (L1) GPS; position can drift under trees and between tall buildings.

Apple		—
Battery lifeUp to 18 hours of normal use; up to 32 hours in Low Power Mode

In Apple's test the watch stays connected to an iPhone over Bluetooth throughout; results vary with use and settings.

Apple		—
ChargingFast charging: about 80% in 45 minutes; 15 minutes gives up to 8 hours of use

Times are with the included Apple Watch Magnetic Fast Charger to USB-C Cable; no adapter is included.

Apple		—
CompatibilityiPhone 11 or later, iPhone SE (2nd generation) or later AppleRequires an iPhone 6s or later with iOS 14 or later Apple
Colour optionsMidnight or Starlight aluminium case 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
Chip—S6 SiP with 64-bit dual-core processor; W3 wireless chip; U1 Ultra Wideband chip

Ultra Wideband availability varies by region.

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
Size and weight—40 × 34 × 10.7 mm; 30.5 g (aluminium, without band) Apple