KeyChords is a user-friendly song composing application designed for iPhone users, allowing individuals to create music without prior experience. The app facilitates the creation of song files with adjustable tempo, key, and scale. Users can add multiple sections to their songs, with chord suggestions generated based on the last chord played, ensuring smooth transitions through automatic chord inversions.

The app offers a variety of features to enhance the songwriting experience, including customizable arpeggios and a selection of drum patterns. KeyChords supports document-based storage, enabling users to save their creations locally or in the cloud. Additionally, once a song is complete, it can be exported as a MIDI file for use in digital audio workstations (DAWs), making it a versatile tool for aspiring musicians and songwriters.