BSE SD/MI Kelas 4 Tema 9 is an Android application that serves as an electronic school book for fourth-grade students in Indonesia. Developed by infinite_apps, this application is licensed for free and belongs to the Education & Reference category, specifically under Books.

This electronic school book serves as a guide for both teachers and students in the primary and Islamic elementary school levels, respectively. It is based on the 2013 Curriculum, with revisions made in 2017, to aid students in their learning process. The book's contents are focused on the theme "Kayanya Negeriku" with four subtopics: Kekayaan Sumber Energi di Indonesia, Pemanfaatan Kekayaan Alam di Indonesia, Pelestarian Sumber Daya Alam Indonesia, and Karyaku Prestasiku (Project Base Learning).

The book's content is complete with a preface, student book information, table of contents, subtopic list, bibliography, author profile, reviewer profile, editor profile, and illustrator profile. The application's features include page search, zoom in/out, a table of contents for each subtopic, and offline usage.