Piano Companion is a music theory app for songwriters, producers, teachers, and students. It’s a flexible piano chord and scale dictionary with user libraries, reverse mode, circle of fifths, and a chord progression builder with common patterns. If you can’t remember the name of a piano chord or scale, this app will help you to find it by key or using your external MIDI keyboard. For example, just press C and G, and you will get C Major as the first piano chord in the search result. If you don’t see a piano chord or a specific scale, you can create a custom piano chord or scale and use it for chord charts or your user library.

👋 Hello Product Hunters! I'm super honored to share PianoCompanion with you today. Piano Companion is a flexible piano chord and scale dictionary, circle of fifths, and chord progression builder. If you can’t remember the name of a piano chord or scale, Piano Companion will help you to find it by key or using your external MIDI keyboard. For example, just press C and G, and you will get C Major as the first piano chord in the search result. If you don’t see a piano chord or a specific scale, you can create a custom piano chord or scale and use it for chord charts or your user library. It shows chord and scale notes on the grand staff, degrees, relative scales, intervals, and fingering for both hands in major and minor scales. Plus, you can contribute your own custom fingering. You can practice scales in different keys and clefs and practice progressions. You can also see a list of compatible chords in the selected scale or a list of compatible scales for a chord. Piano Companion is available for iPhone/iPad/Android/MacOS and used by thousands of teachers, students, musicians worldwide. I'm eager to hear your thoughts!