Apple Watch Series 12

Works with: iPhone only
Display: LTPO OLED
Case sizes: 42 / 46 mm
Battery: 24 hours
GPS battery: 10 hours
Water resistance: 5 ATM
Weight: 39.5 g
Cellular: 5G version

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Apple Watch Series 12 at a glance

Battery

Charge most nights

Up to 24 hours in smartwatch mode. 10 hours with GPS.
GPS

Built-in GPS

Maps on the wrist. Runs and rides without your phone.
Display

LTPO OLED

Up to 2,000 nits and always-on option.
Health

ECG on the wrist

Measures ECG, blood oxygen, skin temperature and HRV.
Phone & smart

iPhone only

LTE, payments, music and calls.
Build

5 ATM water rating

39.5 g. 2 case sizes. Sapphire lens.

Apple Watch Series 12 full specifications

Overview

Brand	Apple
Model	Apple Watch Series 12
Series	Apple Watch
Versions	42mm, Ceramic 47mm
Colours	Dark Bronze, Light Gold, Black, Space Gray, Radiant Gold, Natural, Pearl White, Night Blue

Platform & apps

Needs an iPhone, running watchOS.

Operating system	watchOS
Works with	iPhone only
Minimum iOS	iOS 27
Chipset	S11
Storage	64 GB

Display

A bright, colourful screen that looks like a phone display.

Up to 2,000 nits and always-on option.

Display type	LTPO OLED
Display name	Always-On Retina display
Resolution	416 x 496
Pixel density	326 ppi
Peak brightness	2,000 nits
Colour display	Yes
Always-on display	Yes
Controls	touchscreen, buttons, crown

Design & durability

Comes in 2 case sizes (42, 46 mm) weighing 39.5 g.

Rated 5 ATM: fine for swimming laps and showers. A sapphire lens resists scratches.

Case sizes	42 / 46 mm
Dimensions	46 x 40 x 9.7 mm
Thickness	9.7 mm
Weight (case)	39.5 g
Case material	Aluminum, titanium, ceramic
Lens	Ceramic Shield 2 (aluminum); sapphire front crystal (titanium and ceramic)
Fits wrists	140-245 mm
Water resistance	5 ATM
IP rating	IP6X
Water standard	ISO 22810:2010
Operating temperature	0 to 35 °C
Max altitude	3,000 m

Battery

Charge most nights: up to 24 hours in smartwatch mode.

With GPS on, up to 10 hours. Makers test with their own settings, so treat these as best-case figures.

Battery (smartwatch mode)	24 hours
Battery (GPS)	10 hours
All battery modes	Smartwatch: 24 hours; Battery saver: 38 hours; GPS: 10 hours
Battery type	Li-ion
Charging	puck
Wireless charging	Yes
Fast charging	0-80% in about 30 min

GPS & navigation

Built-in GPS, so you can record runs and rides without your phone.

You can download maps to the watch.

GPS	Built-in
Satellite systems	GPS, GLONASS, Galileo, QZSS, BeiDou
Maps	Downloadable maps
Preloaded regions	U.S. only (topographic maps for national and regional parks)
Navigation features	back-to-start, waypoints, Offline maps with custom route creation

Health & sensors

A health-focused watch: it measures ECG, blood oxygen, skin temperature and HRV.

For sleep, it offers a nightly sleep score. It can warn you about an irregular heart rhythm. ECG availability can depend on your country.

Sensors	optical HR, ECG electrode, SpO2, skin temperature, accelerometer, gyroscope, altimeter, compass, ambient light, thermometer, depth
Heart-rate sensor	always-on optical heart sensor
Heart-rate tracking	24/7
ECG	Yes
Irregular rhythm alerts	Yes
High/low heart-rate alerts	Yes
Heart-rate variability	Yes
Blood oxygen (SpO2)	Yes
Skin temperature	Yes
Respiration rate	Yes
Hypertension alerts	Yes
Sleep tracking	Sleep score
Sleep apnea alerts	Yes
Stress tracking	Yes
Readiness score	Readiness
Cycle tracking	Yes

Safety

Detects hard falls and can call for help if you don't respond.

SOS works over its own LTE connection.

Emergency SOS	From the watch (LTE)
Fall detection	Yes
Crash detection	Yes
Check-ins	Yes

Training

Tracks your workouts and daily activity.

It adds a triathlon mode and running power.

Triathlon / multisport	Yes
Swim tracking	Pool and open water
Training metrics	VO2 max, training load
Running dynamics	Yes
Wrist running power	Yes
External sensors	Bluetooth sensors

Smart features

Smart extras include an LTE version, contactless payments, music storage and calls on the wrist.

Voice assistant: Siri. LTE needs a carrier plan.

Notifications	Yes
Calls on the watch	Yes
Speaker	Yes
Microphone	Yes
Voice assistant	Siri
Contactless payments	Yes
Payment service	Apple Pay
Cellular	5G version available
Music storage	Yes
Wi-Fi	Wi-Fi 4 (802.11n), 2.4/5 GHz
Bluetooth	Bluetooth 5.3
Ultra-wideband	Yes
Flashlight	Yes

Diving, golf & more

It has a depth gauge for snorkelling and water sports.

Rated to 6 m.

Specialist modes	golf, ski
Diving	Depth gauge
Max dive depth	6 m

Specs compiled from Apple's product pages and datasheets. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.