Principles
Glanceable
Complications should be clear and understandable.

Do.
Ensure the data is large enough to read easily. Small, easy-to-read snippets of information work best.

Don’t.
Users shouldn’t need to squint to read a complication’s data.
Time-saving
Users get the information they want quickly by elevating key information from apps to the top level. Because complications remain persistently visible, the data is always available to the user.

Consistency
Complications should integrate well with the style and function of the watch face. Consider adopting the style of the watch face. Be creative.

Do.
Align the style of complications with the watch face.

Don’t.
Complications shouldn’t feel jarring and out-of-place on the watch face.