Chord ai is an app that uses AI technology to provide chords, beats, and other musical information for any song. It can analyze songs from various sources like YouTube, SoundCloud, or your own audio files. The app recognizes chords with high accuracy, including complex chords, and can show different voicings and positions for playing them. It also offers features like key recognition, a chord dictionary, real-time chord recognition, and instrument separation. Chord ai has received positive reviews and is used by over 500k users. It aims to make finding and playing chords for songs easier and more accessible.