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Apple Watch Ultra 4 49mm vs Apple Watch Series 12 42mm

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Apple

Watch Ultra 4 49mm

Apple

Watch Series 12 42mm

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Retail price starting at: $799.99

All monthly pricing req's 0% APR, 36-mo. installment agmt. $0 down for well-qual. customers. Tax on full price due at sale. Restrictions apply.

Retail price starting at: $549.99

All monthly pricing req's 0% APR, 36-mo. installment agmt. $0 down for well-qual. customers. Tax on full price due at sale. Restrictions apply.

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Key differences

Screen

49 x 44 x 12

Aluminum, Titanium: 42 x 37 x 9.7 Ceramic: 43 x 37 x 9.85

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Processor

Chipset S11 chip with 64-bit dual-core processor

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Memory

64GB

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Dimensions

Size (mm)

49 x 44 x 12

Size (inches)

Aluminum, Titanium: 42 x 37 x 9.7

Ceramic: 43 x 37 x 9.85

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Display

Pixels

Active area 422 by 514 pixels

326 pixels per inch

Pixels

374 by 446 pixels

326 pixels per inch

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Battery

Built-in rechargeable lithium-ion battery

Yes

Built-in rechargeable lithium-ion battery

Yes

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Processor

Chipset

S11 chip with 64-bit dual-core processor

Chipset

S11 chip with 64-bit dual-core processor

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Memory

Operating system

watchOS

Subject to change based on future operating system updates

watchOS

Subject to change based on future operating system updates

Siri

The next generation of Apple Intelligence is centered around you, integrated into your apps, and built with privacy.

Apple Intelligence powers Siri AI — an entirely new version of Siri that’s more personal, conversational, and powerful, along with helpful features across apps.

Siri

The next generation of Apple Intelligence is centered around you, integrated into your apps, and built with privacy.

Apple Intelligence powers Siri AI — an entirely new version of Siri that’s more personal, conversational, and powerful, along with helpful features across apps.

5G (U.S. and other countries)*
Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n38, n40, n41, n53, n66, n71
5G (U.S. and other countries)*
Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n38, n40, n41, n66, n71
4G LTE
Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 53, 66, 71
4G LTE
Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71
NumberSync Capable
Required to use smartwatch over cellular; rate plan required
NumberSync Capable
Required to use smartwatch over cellular; rate plan required
Wi-Fi connectivity
Wi‑Fi 4 (802.11n)
Wi-Fi connectivity
Wi‑Fi 4 (802.11n)
Bluetooth technology
v5.3
Bluetooth technology
v5.3
SIM type
Electronic SIM
SIM type
Electronic SIM

Workout
Improved Workout app with new metrics, new views, and advanced ways to train.
Workout
Improved Workout app with new metrics, new views, and advanced ways to train.
Advanced safety features
Satellite communications (Emergency SOS, Messages, Find My)
Emergency SOS
International emergency calling
Siren
Flashlight
Fall Detection
Crash Detection
Last Emergency Call Availability Waypoint
Noise monitoring
Backtrack
Advanced safety features
Emergency SOS
International emergency calling
Fall Detection
Crash Detection
Last Emergency Call Availability Waypoint
Flashlight
Backtrack
Noise monitoring
ECG
Generates an ECG similar to a single-lead electrocardiogram.
ECG
Generates an ECG similar to a single-lead electrocardiogram.
Heart Rate
The most accurate heart rate sensing in a wearable, Series 12 now measures HRV as often as every five minutes for insights on stress and recovery, and takes background heart rate readings every five seconds.
Heart Rate
The most accurate heart rate sensing in a wearable, Series 12 now measures HRV as often as every five minutes for insights on stress and recovery, and takes background heart rate readings every five seconds.

Sensors
Health Sensing System: third-generation electrical heart sensor, always-on optical heart sensor, blood oxygen sensor, and temperature sensor
Depth gauge
Water temperature sensor
Compass
Always-on altimeter
High-g accelerometer
High dynamic range gyroscope
Ambient light sensor
Sensors
Health Sensing System: third-generation electrical heart sensor, always-on optical heart sensor, blood oxygen sensor, and temperature sensor
Compass
Always-on altimeter
High-g accelerometer
High dynamic range gyroscope
Ambient light sensor
Depth gauge to 6 meters
Water temperature sensor
Temperature sensor
Yes
Temperature sensor
Yes

Apple Watch Ultra 4 49mm vs Apple Watch Series 12 42mm

Watch Ultra 4 49mm

Watch Series 12 42mm

Key differences

Size (mm)

Size (inches)

Pixels

Pixels

Built-in rechargeable lithium-ion battery

Built-in rechargeable lithium-ion battery

Chipset

Chipset

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