Android Wear uses 4 interaction types: notifications, watch faces, native apps, and voice commands.
Notifications provide ambient, contextual data. They often provide entry into your app.
Notifications can be expanded to offer lightweight experiences, such as replying to a message, opening a location on a map, or playing a song. Notification templates are available for instant messaging, music playback, and calendar events.
Watch faces can tell more than time; they can show relevant, timely data. By including a gadget called a complication, installed apps may display useful data.
With a single tap on the watch face, users can open an app associated with a complication or change the look of the watch face itself, such as its color.
Developers can create branded, engaging experiences using native Android apps. These apps can take full advantage of the watch’s hardware capabilities to provide on-demand experiences.
Voice actions enable hands-free interactions with Android Wear. These actions tap into Google’s search services and can trigger specific actions on installed apps.