Autochords vs Reverse Chord Finder Pro

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.

Reverse Chord Finder Pro identifies chord names from two or more selected notes. Notes can be entered through a piano, string-instrument layout or music-score notation. The app includes more than 100 chord types and can play results as block chords or arpeggios. Partial matching helps isolate passing melody notes, while Favorites stores identified chords. String layouts support three to twelve strings, left-handed setups and capo options. Music Score mode offers treble and bass staves in all 12 major and minor keys. Users can inspect intervals, chord structure and naming options. Supported instruments include piano, guitar, bass, ukulele and other three- to twelve-string instruments. It runs on iOS and macOS; listings require iOS 15.6 or later and macOS 13.0 or later on Apple M1 or later. Pricing includes a seven-day trial, with personal, family and lifetime plans.