KeyChord - Piano Chords/Scales is a free and easy-to-use app that helps you find chords and scales. You can use it as a learning tool for music or just to have some fun.

KeyChord is based on a virtual keyboard, so you don't need to buy an actual keyboard to use it. You can select any key on your keyboard to find out what chord or scale it is. It's a great app for musicians and music lovers.

The app is built around a 5-octave keyboard. This means that it can play chords from C0 to C5, and scales from C0 to C4.