Autochords vs ChordCraft

Autochords is an iPhone and iPad app that helps songwriters find chord progressions and learn chords on guitar, piano and ukulele. Choose a progression style and key to see a main progression and alternatives for other song sections. Progressions can be previewed at a selected tempo with piano, guitar or ukulele playback, and the app provides diagrams for each instrument. Its built-in library contains dozens of progressions across styles of western music, though some require PRO. The free plan provides the app's free features. PRO adds more progressions, favorites, tempo changes, color themes, custom progressions and MIDI export. Export uses the iOS share sheet to open files in compatible apps, including desktop DAWs such as Logic or GarageBand. PRO costs $2.99 a month, $12.99 a year or 29.99 USD once for lifetime access. If a PRO subscription expires, existing favorites and custom progressions remain accessible, but users cannot add or remove favorites or create or delete custom progressions. Astrocode Pty Ltd develops the app, which is operated by a solo developer.

ChordCraft is a free web-based chord progression generator for producers and musicians. Users choose a genre and mood, then generate progressions with humanized playback and real instruments. The generator lists 10 genres, including Pop, Lo-fi, Jazz, EDM, Rock, R&B, Ambient, Cinematic, Bossa Nova and Hip-Hop, plus eight moods from Happy and Sad to Epic and Mysterious. Voice leading is available, and chords can be edited or locked. Advanced controls cover key selection, chord length and voicing modes. Multiple sections can be combined into a full arrangement. Saved progressions can be exported or imported. Export formats are WAV, stems and MIDI. The Free plan costs nothing and includes those export formats, while listing free generations remaining today. ChordCraft also provides chord audio playback.