Sometimes the name really does say it all. Calendar for Android Wear is a simplistic calendar that people with Android Wear watches can strap to their wrists. It shows the date, keeps track of events, and comes in one of five colors. The app doesn't do much else, but in this case, that's attractive.
The app's usefulness is limited out of the box, as users are restricted to a monthly view and must pay a single in-app purchase of roughly $2 to get access to the daily view with details.