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32GB

64GB

Ask Siri to set a reminder, send an invitation, or give you directions, all without your phone.

Ask Siri to set a reminder, send an invitation, or give you directions, all without your phone.

9

9

Subject to change based on future operating system updates

Required to use smartwatch over cellular; rate plan required

Required to use smartwatch over cellular; rate plan required

802.11b/g/n

802.11b/g/n

2.4GHz and 5GHz

2.4GHz and 5GHz

v5.0

5.3

Electronic SIM

Electronic SIM

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

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

850/1700/1900/2100MHz

850/1700/1900/2100MHz

Set workout-specific goals, see full summaries when you're done, and track how you're trending over time.

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

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

Track a casual walk, an intense ride, and everything in between.

Improved Workout app with new metrics, new views, and advanced ways to train.

Ambient light, accelerometer, barometric altimeter, built-in GPS, gyroscope, third-generation optical heart rate

Electrical heart sensor and ECG app

Third-generation optical heart sensor

High and low heart rate notifications

Sleep stages

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

Yes

Yes

Yes

Apple Music®

Apple Music®