Kalender 2 Abad, Primbon, Shalat, Qiblat, Qur'an is a comprehensive Indonesian calendar app that includes national holidays and various calendar systems such as the Hijriyah, Javanese, Sundanese Candra, and Sundanese Solar calendars. This app provides the Gregorian calendar from 1904 to 2100, the Hijri calendar from 1322 to 1524, the Javanese calendar from 1834 to 2036, the Sundanese Candra calendar from 1837 to 2039, and the Sundanese Solar calendar from 1826 to 2029.

Additionally, the app offers other useful features including prayer schedules, qibla direction, and both the new and old Indonesian translations of the Qur'an. It also provides information about Javanese prima donna, which includes descriptions of personality traits based on birth dates.

One convenient feature of Kalender 2 Abad, Primbon, Shalat, Qiblat, Qur'an is its dark mode option, allowing users to switch to a darker color scheme for comfortable viewing in low-light environments.