Android Wear apps have two states: active and always-on.
In active mode, the display is on and can receive input. All animations and interactions are enabled.
In always-on mode, all interactivity is disabled and the display switches to power-saving mode. Always-on mode reduces battery usage by drastically reducing the number of lit pixels on the display.
The always-on state is best for experiences with periodic interaction during an ongoing task or activity. For example:
- A grocery list app during a shopping trip
- A fitness-tracking app during a run
- Updated bus departure times
- A boarding pass at the airport