Apple Watch Ultra 4 / Apple Watch Series 7 (45 mm, GPS)

Apple Watch Ultra 4: A3579; 49 mm natural titanium; translucent gray Ocean Band

Apple Watch Series 7 (45 mm, GPS): Apple Watch Series 7, 45 mm aluminium case, GPS model. The 41 mm case, GPS + Cellular, stainless steel and titanium versions are separate configurations with different display area and weight.

SpecificationApple Watch Ultra 4Apple Watch Series 7 (45 mm, GPS)
Release year20262021
Announcement / availability9 / 18 September 2026 Apple—
CaseGrade 5 titanium; sapphire front crystal Apple—
Size49 × 44 × 12 mm Apple—
WeightNatural titanium case 63 g Apple—
DisplayLTPO3 OLED; 422 × 514 AppleAlways-On Retina LTPO OLED; 396 × 484 pixels; 1,143 mm² display area; 1,000 nits brightness

The 41 mm case has 352 × 430 pixels and 904 mm² of display area. The LTPO panel lowers its refresh rate when the wrist is down so the screen can stay on.

Apple
Brightness1 nit minimum; 3000 nits peak Apple—
ChipS11; dual-core 64-bit AppleS7 SiP with 64-bit dual-core processor; W3 wireless chip; U1 (Ultra Wideband)

Ultra Wideband availability varies by region.

Apple
Storage64 GB Apple32 GB Apple
Health sensorsElectrical/optical heart; blood oxygen; temperature AppleBlood oxygen sensor (Blood Oxygen app); electrical heart sensor (ECG app); third-generation optical heart sensor

Blood oxygen readings are not for medical use. The ECG app and irregular rhythm notification need the latest watchOS/iOS and are not intended for people under 22.

Apple
Outdoor sensorsDepth, water temperature, compass, altimeter Apple—
PositioningPrecision dual-frequency GNSS Apple—
WirelessWi-Fi 4, 2.4/5 GHz; Bluetooth 5.3; UWB Apple—
CellularA3579: 5G RedCap and LTE Apple—
Manufacturer battery testUp to 50 hours normal use; 84 in Low Power Mode Apple—
ChargingAbout 45 minutes to 80% Apple—
Water / dust100 m rating; IP6X Apple—
Diving limitRecreational diving to 40 m Apple—
Phone compatibilityiPhone 11 / SE 2 or later; iOS 27+ Apple—
Motion and safety—Accelerometer up to 32 g-forces with fall detection; gyroscope; ambient light sensor; Emergency SOS

On the GPS model, Emergency SOS needs the iPhone nearby or a known Wi-Fi network with Wi-Fi Calling; international emergency calling is only on the GPS + Cellular model.

Apple
Location—GPS, GLONASS, Galileo, QZSS and BeiDou; compass; always-on altimeter Apple
Connectivity—Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.0

LTE/UMTS is only on GPS + Cellular models.

Apple
Battery and charging—Up to 18 hours; built-in lithium-ion battery; USB-C magnetic fast charging cable

Apple’s battery test was done in August 2021 with preproduction watches paired to an iPhone; actual life varies with use and settings. The fast-charge test used the A2515 cable and a 20 W USB-C adapter; the adapter is not in the box.

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

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

Apple
Size and weight—45 × 38 × 10.7 mm; aluminium: 38.8 g

The 45 mm stainless steel case weighs 51.5 g and titanium 45.1 g.

Apple
Compatibility—Requires iPhone 6s or later with the latest iOS

Per Apple’s launch documentation; some features are unavailable when the watch is set up through Family Setup.

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