Huria Kristen Batak Protestan (HKBP) has a music app, the Bible, Buku Ende, and songs. 5 Solas are also included, along with a brief catechism by Marthin Luther. Just a heads up, give the music file extraction process a few seconds to complete after the first installation before playing any music.

Some features include being offline. You can use it without the internet. This app is also very effective and has a simple design for easy use. There is no requirement for an internet connection because midi song files are already contained in the program. You can use it anytime, anywhere.