Lunar Calendar is a free Android app developed by Fann Software that provides a Chinese lunar calendar without any ads. This app supports both Traditional Chinese and Simplified Chinese and is designed to support both phone and tablet interfaces. It also features a multi-window feature, allowing users to use other apps while still accessing the calendar.

The app is straightforward and easy to use, with a simple interface that displays the lunar calendar for the current month. Users can also easily navigate to previous or future months to view the lunar calendar for those months. Overall, Lunar Calendar is a useful app for those interested in Chinese lunar calendars and want a simple and ad-free experience.