Tirupati Online Booking (TTD) is a free Android app developed by Sree Sai Prakash Medi. The app's main goal is to provide a user-friendly interface for booking and information about Tirumala Tirupati Devasthanams (TTD), as well as information about the surrounding areas of Tirupati and Tirumala. The app offers a variety of features, including Dharshan details, Mp3 songs, stories, Sevas info, wallpapers, online booking, ticket status, accommodation, information about other temples, a game called Govinda, Seva's registration, TTD calendar, an alarm, chanting (manual and automatic), TTD magazine, maps of temples from your current location, news, and live updated videos.

Overall, Tirupati Online Booking (TTD) is a useful app for those planning to visit TTD or those who want to learn more about the area. The app provides detailed information about TTD and surrounding areas, as well as a variety of features to help users plan their trip. The app's interface is user-friendly, making it easy to navigate and use the different features. However, it is important to note that this is not an official app and users should verify any information provided in the app with official sources.