Music Theory-How to play piano is an interactive application designed for iPhone users to simplify music theory and enhance piano skills. It features animated and engaging lessons that help users learn to read sheet music, improve sight-reading abilities, and refine note identification through timed exercises. The app also offers personalized guidance and exercises tailored to each user's skill level, allowing for steady progress from beginner to advanced stages.

The application includes a variety of music theory lessons covering essential topics such as staff, clefs, note durations, and time signatures. Users can access identification exercises to practice recognizing notes and measures, along with customizable practice ranges. A subscription option provides unlimited access to all lessons and exercises while offering a time challenge mode and detailed statistics to track learning progress over time.