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Apple Watch Series 12

Apple Watch Ultra 4

Apple Watch SE 3

Choose models to compare.

Images

GPS

GPS

Not Applicable

GPS

GPS + Cellular

GPS + Cellular

Aluminium

Aluminium

Dark Bronze, Light Gold, Black, Space Grey

Aluminium not applicable

Aluminium

Midnight, Starlight

Titanium

Titanium

Radiant Gold, Natural

Titanium

Natural, Black

Titanium not applicable

Ceramic

Ceramic

Pearl White, Night Blue

Ceramic not applicable

Stainless Steel

Stainless steel not applicable

Buy

Case Size

46mm or 42mm case size

49mm case size

44mm or 40mm case size

Display

Always‑On Retina display

Up to 2,000 nits

Wide‑angle OLED

LTPO3

Always‑On Retina display

Up to 3,000 nits

Wide‑angle OLED

LTPO3

Always‑On Retina display

Up to 1,000 nits

OLED

LTPO

Heart Health

Recovery HRV

High‑frequency background heart rate tracking

Hypertension notificationsRefer to legal disclaimers.

ECG appRefer to legal disclaimers.

High and low heart rate notifications

Irregular rhythm notificationsRefer to legal disclaimers.

Low cardio fitness notifications

Blood Oxygen appRefer to legal disclaimers.

Recovery HRV

High‑frequency background heart rate tracking

Hypertension notificationsRefer to legal disclaimers.

ECG appRefer to legal disclaimers.

High and low heart rate notifications

Irregular rhythm notificationsRefer to legal disclaimers.

Low cardio fitness notifications

Blood Oxygen appRefer to legal disclaimers.

HRV

Heart Rate Tracking

Hypertension notifications not applicable

ECG app not applicable

High and low heart rate notifications

Irregular rhythm notificationsRefer to legal disclaimers.

Low cardio fitness notifications

Blood Oxygen app not applicable

Sleep

Sleep tracking

Sleep apnoea notificationsRefer to legal disclaimers.

Sleep score

Sleep tracking

Sleep apnoea notificationsRefer to legal disclaimers.

Sleep score

Sleep tracking

Sleep apnoea notificationsRefer to legal disclaimers.

Sleep score

Vitals

Vitals app featuring heart rate, respiratory rate, wrist temperature, blood oxygen and HRVRefer to legal disclaimers.

Vitals app featuring heart rate, respiratory rate, wrist temperature and sleep durationRefer to legal disclaimers.

Women’s Health

Wrist temperature sensingRefer to legal disclaimers.

Cycle TrackingRefer to legal disclaimers.

Improved period predictions

Fertile window estimates

Retrospective ovulation estimates

Perimenopause and menopause supportRefer to legal disclaimers.

Wrist temperature sensingRefer to legal disclaimers.

Cycle TrackingRefer to legal disclaimers.

Improved period predictions

Fertile window estimates

Retrospective ovulation estimates

Perimenopause and menopause supportRefer to legal disclaimers.

Wrist temperature sensingRefer to legal disclaimers.

Cycle TrackingRefer to legal disclaimers.

Improved period predictions

Fertile window estimates

Retrospective ovulation estimates

Perimenopause and menopause supportRefer to legal disclaimers.

Apple Intelligence

Apple IntelligenceRefer to legal disclaimers.

Audio IntelligenceRefer to legal disclaimers.

Siri AIRefer to legal disclaimers.

Apple IntelligenceRefer to legal disclaimers.

Audio IntelligenceRefer to legal disclaimers.

Siri AIRefer to legal disclaimers.

Apple IntelligenceRefer to legal disclaimers.

Audio Intelligence not applicable

Siri AIRefer to legal disclaimers.

Safety

Emergency SOSRefer to legal disclaimers.

Emergency SOS via satellite not applicable

International emergency callingRefer to legal disclaimers.

Fall Detection and Crash DetectionRefer to legal disclaimers.

Emergency siren not applicable

Emergency SOSRefer to legal disclaimers.

Emergency SOS via satelliteRefer to legal disclaimers.

International emergency callingRefer to legal disclaimers.

Fall Detection and Crash DetectionRefer to legal disclaimers.

Siren

Emergency SOSRefer to legal disclaimers.

Emergency SOS via satellite not applicable

International emergency callingRefer to legal disclaimers.

Fall Detection and Crash DetectionRefer to legal disclaimers.

Emergency siren not applicable

Water resistance

Water resistant 50mRefer to legal disclaimers.

Swim, snorkel

Depth gauge to 6m

Water temperature sensor

Water resistant 100mRefer to legal disclaimers.

Swim, snorkel, scuba dive, high‑speed water sports

Depth gauge to 40m

Water temperature sensor

Water resistant 50mRefer to legal disclaimers.

Swim

Depth gauge not applicable

Water temperature sensor not applicable

Connectivity

Precision L1 GPS

Cellular optionsRefer to legal disclaimers.

5G capable Refer to legal disclaimers.

Precision dual‑frequency GPS

Cellular and satelliteRefer to legal disclaimers.

5G capable Refer to legal disclaimers.

GPS

Cellular optionsRefer to legal disclaimers.

5G capable Refer to legal disclaimers.

Chip

S11 chip

Wrist flick gesture

Single and double tap gestures

Siri AIRefer to legal disclaimers.

Precision Finding for iPhoneRefer to legal disclaimers.

S11 chip

Wrist flick gesture

Single and double tap gestures

Siri AIRefer to legal disclaimers.

Precision Finding for iPhoneRefer to legal disclaimers.

S10 chip

Wrist flick gesture

Single and double tap gestures

Siri AIRefer to legal disclaimers.

Find iPhone

Power and Battery Life

Up to 24 hoursRefer to legal disclaimers.

Up to 38 hours in
Low Power ModeRefer to legal disclaimers.

Fast‑charge capable
(0–80% in about 30 minutes; 15 minutes for up to 12 hours)Refer to legal disclaimers.

Up to 50 hoursRefer to legal disclaimers.

Up to 84 hours in
Low Power ModeRefer to legal disclaimers.

Fast‑charge capable
(0–80% in about 45 minutes; 15 minutes for up to 18 hours)Refer to legal disclaimers.

Up to 18 hoursRefer to legal disclaimers.

Up to 32 hours in
Low Power ModeRefer to legal disclaimers.

Fast‑charge capable
(0–80% in about 45 minutes; 15 minutes for up to 8 hours)Refer to legal disclaimers.

Legal Disclaimers

Apple Intelligence: Apple Intelligence is available on all Apple Watch Series 9 and later, Apple Watch Ultra 2 and later, and Apple Watch SE 3 models when paired with an Apple Intelligence–enabled iPhone nearby, with Siri and device language set to Chinese (Simplified), Chinese (Traditional), Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish or Vietnamese. Some features may not be available in all regions or languages. Some devices may not be available in all regions.
Audio Intelligence: Audio Intelligence includes Live Rewind, Siri Recap, Sound Recognition and faster Shazam, and requires Apple Watch Series 12 or Apple Watch Ultra 4. Live Rewind and Siri Recap will be available in beta in late 2026 and require an Apple Intelligence–enabled iPhone 16 or later (excluding iPhone 16e). Will be available in English to start and will not initially be available in the EU. Certain Audio Intelligence features that rely on server‑side models are subject to daily usage limits, including but not limited to Live Rewind and Siri Recap. For more information, visit support.apple.com/en‑gb/148354.
Straps: Straps for illustrative purposes only and subject to availability.
Blood Oxygen: The Blood Oxygen app is for wellness purposes only and not for medical use.
Cellular and Wireless: Wireless service plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability. Check apple.com/uk/watch/cellular for participating network providers and eligibility. See support.apple.com/en-gb/HT207578 for additional setup instructions.
Compatibility: watchOS 27 requires Apple Watch Series 9 or later, Apple Watch SE 3, or Apple Watch Ultra 2 or later paired with an iPhone 11 or later or iPhone SE (2nd generation or later) with iOS 27 or later.
Cycle Tracking with Perimenopause: The Cycle Tracking app should not be used for birth control or to diagnose a health condition. Cycle deviation notifications are based solely on the user’s logged cycle history. Cycle deviation notifications inclusive of perimenopause are for people 40 years old or older. These notifications are not intended to replace traditional methods of diagnosis, monitoring or treatment of perimenopause or menopause.
ECG: The ECG app is available on Apple Watch Series 4 and later (excluding Apple Watch SE models) and can generate an ECG similar to a single‑lead electrocardiogram. Intended for use by people 22 years old or older.
Emergency SOS via Satellite: Emergency SOS requires a satellite connection, cellular connection or Wi-Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that mobile service is available. Some mobile networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular mobile network, if it isn’t set up for mobile service, or if the mobile network does not support emergency calling over IMS. See support.apple.com/en‑gb/108374 and apple.com/uk/watch/cellular for more information.
Fast Charging: Fast charging is compatible with Apple Watch Series 7 and later, Apple Watch SE 3 and all Apple Watch Ultra models.
Feature Availability: Features are subject to change. Some features, applications and services may not be available in all regions or all languages. See apple.com/uk/watchos/feature‑availability for complete list.
5G Connectivity and Wireless: Data plan required. 5G is available in selected markets and through selected network providers. Speeds vary based on site conditions and network. For details on 5G support, contact your provider and see apple.com/uk/watch/cellular.
Hypertension Notifications: Hypertension notifications are not intended for use by people under 22 years old, those who have been previously diagnosed with hypertension, or pregnant persons.
International Emergency Calling: International emergency calling requires an Apple Watch Series 5 (GPS + Cellular) or later, Apple Watch SE (GPS + Cellular) or later, or Apple Watch Ultra or later. For a list of supported countries and regions, see apple.com/uk/watchos/feature‑availability.
IRN (Irregular Rhythm Notification): Irregular rhythm notifications are not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AF).
Power and Battery: Battery life varies by use and configuration. See apple.com/uk/watch/battery for more information.
Precision Finding for iPhone: Requires an iPhone and Apple Watch with second‑generation Ultra Wideband chip. Ultra Wideband availability varies by region. For more information, visit support.apple.com/en‑gb/109512.
Satellite: Emergency SOS and Find My via satellite are included free for two years with the activation of Apple Watch Ultra 3 or later. Connection and response times vary based on location, site conditions and other factors. Find My via satellite requires a mobile plan. Satellite connectivity provided by Globalstar and its affiliates. See support.apple.com/en‑gb/123924 for more information.
Siri AI: Apple Intelligence is available with Siri and device language set to Chinese (Simplified), Chinese (Traditional), Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish or Vietnamese. Some features may not be available in all regions or languages. Some devices may not be available in all regions. Siri AI is available in beta in watchOS 27 and requires an Apple Intelligence–enabled device set to a supported language. Available in English to start. Siri AI will not be initially available in the EU on watchOS. Certain Apple Intelligence features that rely on server‑side models are subject to daily usage limits, including but not limited to Siri AI. Daily limits may vary by feature, request complexity, system demand, system policies and other factors. Expanded access to such features will be available for a fee in the future. Use of these features is subject to the Apple Intelligence Terms and Conditions. Learn more at apple.com/uk/apple‑intelligence.
Sleep Apnoea Notifications: Sleep apnoea notifications are available on Apple Watch Series 9 and later, Ultra 2 and later, and SE 3. The feature is intended to detect signs of moderate to severe sleep apnoea for people 18 years old or older without a diagnosis of sleep apnoea.
Temperature Sensing: The temperature sensing feature is not intended for medical use. Temperature sensing is available on Apple Watch Series 8 and later, Apple Watch SE 3 and all Apple Watch Ultra models.
Vitals: The Vitals app is for wellness purposes only and not for medical use.
Water and Dust Resistance: Apple Watch Series 2 and later and Apple Watch SE and later have a water resistance rating of 50 metres under ISO standard 22810:2010. This means that they may be used for shallow‑water activities like swimming in a pool or ocean. Series 10 and later can also be used for snorkelling to 6 metres. However, they should not be used for scuba diving, waterskiing or other high‑velocity water sports. Apple Watch Ultra models have a water resistance rating of 100 metres under ISO standard 22810:2010. They may be used for recreational scuba diving (with compatible third‑party app from the App Store) to 40 metres and high‑speed water sports. They should not be used below 40 metres. Water resistance is not a permanent condition and can diminish over time. For more information, see support.apple.com/en‑gb/109522. Apple Watch Series 8 and later and Apple Watch Ultra models are rated IP6X dust resistant.