Kalender Sembahyang Indonesia Gratis is an Android app developed by MataPanda that provides comprehensive information on prayer times based on the Lunar Calendar. The app also includes features such as reminders for prayer times, shio information, and zodiac birth dates. It also features Mantra TA PEI COU / 大 悲 咒 / Maha Karuna Dharani along with his songs and Mantra SUTRA HATI / 心 經 / SUTRA PRAJNAPARAMITA HRDAYA. Additionally, the app provides records on the selected date on the primary calendar, information on good and bad days, and 4 Pillars of Destiny (Pillar of Heaven and Earth Pillar) or commonly known by the name bazi (八字), which will be displayed in each of the selected date. The app requires access to media storage, but the developer assures the users that they will not access any personal files. Overall, Kalender Sembahyang Indonesia Gratis is a useful app for those who wish to stay informed about prayer times and related information.