Lich Cong Giao is a lifestyle app developed by Pet that serves as a comprehensive Catholic calendar for Android users. This app offers a wide range of features, including a widget that displays both the solar and lunar calendars, daily Bible readings, monthly prayer intentions set by the Pope, and a note-taking function. Other features include a comprehensive list of Vietnamese martyrs, a directory of churches and parishes, and online Mass videos.

With Lich Cong Giao, users can switch between the solar and lunar calendars, view important feast days and liturgical celebrations, and read daily Bible passages. The app also allows users to share quotes from the Bible on social media platforms. Additionally, users can access news about the Catholic Church and listen to sermons.

The app is user-friendly, has an intuitive interface, and is available for free. Once installed, the app can be used offline. Overall, Lich Cong Giao is a useful app for Vietnamese Catholics who want to stay up-to-date with the Catholic liturgical calendar and access spiritual resources on their Android devices.