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Apple Watch Series 9 45mm vs Apple Watch Series 8 45mm

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Apple

Watch Series 9 45mm

Apple

Watch Series 8 45mm

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Dimensions

Size (mm)

45.00 x 38.00 x 10.7

Size (mm)

45.00 x 38.00 x 10.7

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Display

Pixels

396 by 484 pixels

Pixels

396 by 484 pixles

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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

S9 SiP with 64-bit dual-core processor

Chipset

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Memory

Operating system

Wireless technology

4G LTE

Bands 1, 2, 3, 4, 5, 7, 12, 13, 17, 18, 19, 25, 26, 39, 40, 41, 66

4G LTE

Bands 1, 2, 3, 4, 5, 7, 12, 13, 17, 18, 19, 25, 26, 39, 40, 41, 66

UMTS/HSPA+/DC-HSDPA

850/1700/1900/2100MHz

UMTS/HSPA+

850/1700/1900/2100MHz

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

802.11b/g/n

Wi-Fi connectivity

802.11b/g/n

Wi-Fi capability

2.4GHz and 5GHz

Wi-Fi capability

2.4GHz and 5GHz

Bluetooth technology

5.3

Bluetooth® technology

v5.0

SIM type

Electronic SIM

SIM type

Electronic SIM

Apps

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

Siren, Backtrack, Fall Detection,⁸Emergency SOS,⁹ and Crash Detection.

Advanced safety features

Siren, Backtrack, Fall Detection, Emergency SOS, and Crash Detection.

Activity

Track your daily activity on Apple Watch, and see your trends in the Fitness app on iPhone.

Activity

Track your daily activity on Apple Watch, and see your trends in the Fitness app on iPhone.

ECG

Generates an ECG similar to a single-lead electrocardiogram.

ECG

Generates an ECG similar to a single-lead electrocardiogram.

Heart Rate

Keep tabs on your resting, walking, and workout recovery heart rate.

Heart Rate

Keep tabs on your resting, walking, and workout recovery heart rate.

Sensors

Electrical heart sensor and ECG app

Third-generation optical heart sensor

High and low heart rate notifications

Irregular rhythm notifications

Sleep stages

Temperature sensing

Compass

Always-on altimeter

High-g accelerometer

Up to 256 g-forces with Fall Detection and Crash Detection

High dynamic range gyroscope

Ambient light sensor

Sensors

Ambient light, accelerometer, barometric altimeter, built-in GPS, gyroscope, third-generation optical heart rate, electrical heart rate (ECG app), blood oxygen² sensor, temperature sensor³

Temperature sensor

Yes

Temperature sensor

Yes

Messaging & email

Music

Apple Watch Series 9 45mm vs Apple Watch Series 8 45mm

Watch Series 9 45mm

Watch Series 8 45mm

Size (mm)

Size (mm)

Pixels

Pixels

Built-in rechargeable lithium-ion battery

Built-in rechargeable lithium-ion battery

Chipset

Chipset

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