Choose the key you want to use, C, A, E … whatever. Then choose a type of chord progression. The app will show you a lot of chord progressions that sound incredibly well. You can play with your instrument the progressions as they appear on the screen or use them as inspiration for your own composition. You also have a help page with tips to get the most out of the app.
It is the perfect app for musicians/songwriters who want to have a tool that generates a multitude of different chord progressions to help them in their work as a composer, practice time or simply to organize a small jam with friends.