Mahina is a unique moon phase viewer with a Hawaiian twist, providing an accurate representation of the current moon phase through a 3-D model of the earth-moon-sun geometry. It incorporates detailed calculations considering various orbital characteristics like inclination, distance, and obliquity. Users can view relevant ephemeris data without the need for a network connection.

The app estimates the traditional Hawaiian lunar calendar day name based on astronomical full moon predictions near the beginning of the Hawaiian day Hoku. Mahina offers interactive features such as pinch-zoom gestures, animated moon phases, and customizable ephemeris data display. Users can also receive notifications for upcoming phases and explore moon phases for a full calendar year.