Applications that provide educational features such as writing, reading and arithmetic. The Calistung app has three menus: Learn Letters, Numbers, and Counting. Learning to read will be present in every menu because children can learn to pronounce the proposed characters/words with the Text-to-speech feature, as well as learn to write because they have to write characters/words. Learning to count will be in the Counting menu by studying addition and subtraction material (including Jarimatika), then practicing it. This learning application will have "Learning" and "Practice" sub menus in each main menu because children need to learn and practice the topic first before doing the exercises. The theory of the topic will be presented in the “Learn” submenu, right before doing the practice. The “Practice” submenu will present various exercises to strengthen children's calistung skills.