Pustaka Si Badia is a free Android app developed by Rilix Technology Apps that offers a comprehensive set of worship materials for Gereja Batak Karo Protestan (GBKP) congregations. This app includes Pustaka Si Badia, Kitab Enden-Enden, Penambahen ende-Enden, Supplemen ende-Enden, Kidung Jemaat with Audio, Liturgi 52 Minggu, and a blocking internet feature to remove distractions during worship.

Pustaka Si Badia is a translation made by Lembaga Alkitab Indonesia and is a valuable resource for GBKP congregations. The app provides a seamless experience with its user-friendly interface and easy navigation. The app's blocking internet feature is a useful addition to minimize distractions during worship. The audio feature for Kidung Jemaat is a great help for those who may not be familiar with the hymns.

Overall, Pustaka Si Badia is an excellent worship app that offers a comprehensive set of worship materials for GBKP congregations. The app is a must-have for those who want to enhance their worship experience.