OtoTheory review
A focused chord workspace that combines analysis, suggestions, visualization, exports, and DAW integrations.
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
OtoTheory is a web and iOS chord progression builder for guitarists, bassists, keyboard players, songwriters, and DAW users. It supports diatonic chord finding by key and scale, editable progression building, groove playback, chord and scale visualization, and AI-powered suggestions. Users can work with bridge, substitute, and advanced suggestion modes, manage verse, chorus, and bridge sections, and analyze keys, scales, and Roman numerals. The product is suited to writers who want chord-focused composition tools with instrument-aware views rather than a general production environment.
Its feature depth is strongest around turning chord ideas into workable progressions. OtoTheory can import AI-generated chord progressions, detect chords from audio files or recordings on-device, and show material for guitar, bass, and keyboard. Real-time groove playback helps connect written progressions with rhythmic context. Exports include MIDI, audio, PDF, and text, while integrations with Logic Pro, Cubase, Ableton Live, and GarageBand support movement into established DAW workflows. Chord detection is iOS-only, while the web tools cover chord finding and progression building.
The published plans show a Free tier with AI chord progression import, 19 groove patterns, 50+ preset progressions, visualization, detection, and text export. Pro Monthly costs $5.99 per month; Pro Annual costs $49.99 per year; both add unlimited MIDI and audio export, unlimited saves, iCloud sync, and Pro-exclusive grooves. The Lifetime plan costs $99.99 once and unlocks all Pro features forever. A 7-day free trial is also available. OtoTheory fits songwriters who want structured chord exploration and AI assistance; users seeking a wider production suite should look elsewhere.
OtoTheory pros and cons
- Where it wins
- AI suggestions, progression import, and editable chord building
- On-device audio chord detection with key, scale, and section analysis
- MIDI, audio, PDF, and text export plus four DAW integrations
- Where it doesn't
- Chord detection is available only on iOS
- Unlimited saves and full export require a Pro plan
- The workflow focuses on chords rather than broader music production
OtoTheory fact sheet, pricing and score →
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