MusicSymbols 音楽記号用語辞典 is a free Android app developed by TONTATA. It is a dictionary application for music notation and terminology. The app includes basic symbols and terms used in sheet music. It contains approximately 650 words, which are classified into different categories, such as note symbols, tempo symbols, and instrument abbreviations, among others.

The app is designed to provide a quick and easy reference for musicians and music students on the go. It is a useful tool for those who want to learn more about music notation and terminology. With its simple and intuitive interface, users can easily search for the terms they need and find concise definitions and explanations. The app is a great resource for anyone who wants to improve their music knowledge and understanding.