Moonphase is a free personalization app developed by Oktasoft for Android Wear 2.0 and above. The app provides an interactive and ambient mode with a display of the lunar phases, date, time, and day of the week.

In interactive mode, Moonphase displays the date and time along with the lunar phase, age, and seconds. The app calculates the lunar age by subtracting the Julian date of the previous new moon from the current Julian date. In ambient mode, Moonphase displays the same information but adds the twelve-hour system.

Moonphase also features a battery indicator that gradually turns red when the battery level drops below 30%.