Tech riderRev. 29 Sept 2026
OtoTheory
- 1Runs oniOS, Web
- 2CostsFree plan · free trial
- 3Reverse chord lookupYes
- 4Progression generatorYes
- 5Voicing explorerYes
- 6Supported instrumentsguitar, bass, keyboard
- 7Chord chart exportYes
- 8Mobile appsios
8 lines stated Written from the maker's own pages: ototheory.com
Overview
OtoTheory is ranked #1 of 27 in chord finder software on Specifiction. It runs on iOS, Web. There is a free plan. A free trial is offered.
OtoTheory plans and pricing
All plansFree Free iOS app · 3 local sketch saves · MIDI/audio export unavailable ototheory.com · 29 Sept 2026
Lifetime $99.99 once One-time purchase iOS only · all Pro features forever · unlimited MIDI/audio export, saves, and iCloud sync ototheory.com · 29 Sept 2026
Pro Not published Monthly or annually; annual plan is $49.99/year iOS only · 7-day free trial · unlimited MIDI/audio export · unlimited saves and iCloud sync · Pro-exclusive grooves ototheory.com · 29 Sept 2026
Compared on chord finder software
- Free plan
- Yesototheory.com
- Paid from
- $5.99/moototheory.com
- Reverse chord lookup
- Yesototheory.com
- Progression generator
- Yesototheory.com
- Voicing explorer
- Yesototheory.com
- Supported instruments
- guitar, bass, keyboardototheory.com
- Chord chart export
- Yesototheory.com
- Mobile apps
- iosototheory.com
- Chord audio playback
- Yesototheory.com
Facts
- Product
- OtoTheory is a chord progression builder and music theory companion for guitar, bass, keyboard players, and DAW users.ototheory.com · 29 Sept 2026
- Song analysis
- The iOS app detects chords, key, and song sections from imported audio or a guitar or piano recording on-device.ototheory.com · 29 Sept 2026
- AI chord import
- Users can paste chord progressions from ChatGPT, Claude, or Gemini for Roman numeral analysis and playback with grooves.ototheory.com · 29 Sept 2026
- Grooves and presets
- OtoTheory lists 19 groove patterns and more than 50 chord progression presets.ototheory.com · 29 Sept 2026
- AI suggestions
- OtoTheory AI suggests chords using three layers of musical understanding described as feel, theory, and emotion.ototheory.com · 29 Sept 2026
- MIDI export
- Pro exports progressions in Groove, Groove + Theory, or Chords Only modes, with BPM, section markers, and chord names.ototheory.com · 29 Sept 2026
- DAW compatibility
- The maker says MIDI exports can be used with Logic Pro, Cubase, Ableton, and other DAWs.ototheory.com · 29 Sept 2026
- Web limits
- The web version offers a subset of iOS features, with limited grooves and presets; Pro is iOS-only.ototheory.com · 29 Sept 2026
- Integrations
- The iOS app offers optional iCloud sync for Pro, and exported MIDI can be transferred to a Mac with AirDrop.ototheory.com · 29 Sept 2026
- Privacy and security
- The privacy policy says communications use HTTPS, iOS cloud sync uses Apple CloudKit’s encrypted infrastructure, and OtoTheory does not sell personal data.ototheory.com · 29 Sept 2026
- Data handling
- Sketches are stored locally on the device or in the user’s iCloud account for Pro, while web sketches are stored in browser localStorage.ototheory.com · 29 Sept 2026
- Support
- The support page lists [email protected] and says it typically responds within two business days, excluding weekends and holidays.ototheory.com · 29 Sept 2026
- Intended users
- The maker describes OtoTheory as intended for beginners, songwriters and composers, self-learners, and guitar, bass, and keyboard players.ototheory.com · 29 Sept 2026
Company
- Headquarters
- Tokyo, Japanototheory.com · 23 Sept 2026
Best OtoTheory alternatives
See all 12 All accessCh 02 ChordU Free planAndroidiOS from $4.17/mo7.4 All accessCh 03 HarmonyBuilder Free trialLinuxMac from $14/mo7.2 All accessCh 04 Chordio Free planiOSMac Free to start7.1 All accessCh 05 Chord Analyser Free planAndroidiOS Free to start6.9 All accessCh 06 ChordSequence Free planAndroidWeb Free to start6.9 All accessCh 07 SongEngine Free planMacWindows Free to start6.9
Where it ranks on Specifiction
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Sources
- ototheory.com· checked 29 Sept 2026
- ototheory.com/get-chords· checked 29 Sept 2026
- ototheory.com/about· checked 29 Sept 2026
- ototheory.com/pricing· checked 29 Sept 2026
- ototheory.com/privacy· checked 29 Sept 2026
- ototheory.com/support· checked 29 Sept 2026