Compare devices

64GB

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

9

Subject to change based on future operating system updates

Required to use smartwatch over cellular; rate plan required

802.11b/g/n

2.4GHz and 5GHz

5.3

Electronic SIM

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

850/1700/1900/2100MHz

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

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

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

Apple Music®