ChordOne Downloads & RevenueChordOne - Chords Toolkit · App Store
Not in any tracked top chart right now.
Updated 8 Nov 2026 · rankings refresh through the day
Developer炯龙 吴
CategoryMusic
PriceFree
Released
Rating★ 4.7 (23)
Version3.2.0
Age rating4+
First seen by us
24 Oct 2026
24 Oct 2026ChordOne - Chords Toolkit update history & changes
Last change · 3 events since 13 Mar 2017Full timeline ↓Full timeline · 3 events
- 🆕ChordOne - Chords Toolkit first spotted by AppInsiderUnited States (found via developer)
- 📦ChordOne - Chords Toolkit version 3.2.0This update greatly enhances chord tools. New features include the Composition tab, chord construction formulas and floating piano keyboard, with multi-language switching and sound effect controls.
【Overall Interaction Upgrade】
- Tap the piano keyboard or fingering diagram on any page to preview chord audio
- Chord tones are displayed more prominently for easy viewing
- Different colors distinguish the chord root note from other chord tones
- Visual improvements for mode chord markers for better readability
- Guitar and ukulele chords are now on dedicated pages, no need to switch instruments to view
【Chord Detail Page】
- Added chord construction formulas to view detailed steps for building each chord
- Optimized inverted chord section to clearly show notes and finger positions for all inversions
- Improved fingering panel, displaying both left and right hand fingerings with labeled notes
【Mode Chords】
- Added history floating window to view and play recently browsed chords. Create new chord progressions to explore chord combinations efficiently
- Added type tags to quickly filter different mode chord categories
- Piano keyboard and history are now floating windows that can be manually closed
【Composition】
- The original chord sequence page is now an independent 【Composition】tab
- Built-in classic chord progression templates to quickly start new compositions
- Switch between keys to view corresponding chord progressions
- Tap chords and time values directly on the Composition page for editing
- The piano keyboard at the bottom of the Composition page is converted to a manually closable floating window
【Other Additions & Improvements】
- Added Traditional Chinese and English languages, support in-app language switching
- Added reverb and delay effects for more realistic playback sound
- Interface styling optimized, with support for iPad
- Compatible with iOS 27
- Various minor improvements and bug fixes… more - 🆕ChordOne - Chords Toolkit released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.7 ★
23 ratings
Measured
ChordOne - Chords Toolkit on the App Store
App details
App ID
1211927482
Publisher
炯龙 吴
On the store since
Mar 2017
9 years on the store
Minimum OS
iOS 17.6+
iPhone XS and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
3
EN ZH ZH
Size
121 MB
Also listed in
Education
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.7 ★
23 ratings
Measured
Ratings
23
Measured
About ChordOne - Chords Toolkit
80,000+ musicians are using this portable chord assistant!
Explore chords, master harmonic rules and spark creative inspiration with intuitive interactive tools.
Look up chords anytime, anywhere, and listen to experience chord colors.
Whether you are a music beginner or professional musician, quickly find chords and improve your harmony skills efficiently.
【App Features】
- Massive Chord Library: Includes 1500+ piano chords, 2500+ guitar fingerings and 1000+ ukulele chord fingerings, covering a wide range of commonly used chords.
- Multi-dimensional Visual Analysis: View chord symbols, component notes, piano key diagrams, fingering charts, chord construction theory, inversions, staff notation and circle of fifths. Go beyond chord shapes and truly understand the underlying logic of harmony.
- Professional Chord Playback: Tap to play chord audio and feel the emotional tone of each chord. Switch between piano / guitar / ukulele. Customize playback speed, playback range and play mode. Built-in reverb and delay effects.
- Build Your Own Chord Progressions: Combine chords freely to create unique harmonic movements. Break free from generic patterns and craft your own musical style!
【Core Functions】
- Chord Lookup: Search by chord type, reverse lookup by keys, text search. Multiple ways to locate chords quickly.
- Modal Chords: Generate diatonic chords for any key, showing chord symbols, component notes and harmonic relationships. Ideal for harmony arrangement, impromptu accompaniment and songwriting.
- Interactive Circle of Fifths: Visualize harmonic relationships. A practical tool for composition, improvisation and music arrangement.
- Chord Progressions: Predefined classic progressions. Create custom chord sequences, export MIDI files for seamless integration with DAWs including GarageBand, Cubase, Logic Pro and more.
- Guitar Chord Library: 100 chord types with over 2500 fingerings.
- Ukulele Chord Library: 100 chord types with over 1000 fingering diagrams.
- Chord Ear Training: Train your ear to recognize chords step by step, from triads to ninth chords.
- Chord Beginner Courses: Beginner-friendly video tutorials covering basic chords all the way to advanced extended chords.
【Chord Types】
Covers beginner to professional-level chords for pop, classical, jazz and other music genres:
Triads, seventh chords, altered seventh chords, sus chords, added tone chords, ninth chords, altered ninth chords, eleventh chords, altered eleventh chords, thirteenth chords, altered thirteenth chords, power chords, major sixth chords, minor sixth chords, six-nine chords, minor six-nine chords, etc.
【Modal Chord Types】
Diatonic triads, diatonic seventh chords, diatonic sus chords, diatonic added tone chords, diatonic extended chords, other diatonic chords, secondary chords, secondary seventh chords, secondary leading tone chords, secondary leading tone seventh chords.
【User Reviews】
“I can quickly check chord tones and train my ear to identify notes in each chord. It
Explore chords, master harmonic rules and spark creative inspiration with intuitive interactive tools.
Look up chords anytime, anywhere, and listen to experience chord colors.
Whether you are a music beginner or professional musician, quickly find chords and improve your harmony skills efficiently.
【App Features】
- Massive Chord Library: Includes 1500+ piano chords, 2500+ guitar fingerings and 1000+ ukulele chord fingerings, covering a wide range of commonly used chords.
- Multi-dimensional Visual Analysis: View chord symbols, component notes, piano key diagrams, fingering charts, chord construction theory, inversions, staff notation and circle of fifths. Go beyond chord shapes and truly understand the underlying logic of harmony.
- Professional Chord Playback: Tap to play chord audio and feel the emotional tone of each chord. Switch between piano / guitar / ukulele. Customize playback speed, playback range and play mode. Built-in reverb and delay effects.
- Build Your Own Chord Progressions: Combine chords freely to create unique harmonic movements. Break free from generic patterns and craft your own musical style!
【Core Functions】
- Chord Lookup: Search by chord type, reverse lookup by keys, text search. Multiple ways to locate chords quickly.
- Modal Chords: Generate diatonic chords for any key, showing chord symbols, component notes and harmonic relationships. Ideal for harmony arrangement, impromptu accompaniment and songwriting.
- Interactive Circle of Fifths: Visualize harmonic relationships. A practical tool for composition, improvisation and music arrangement.
- Chord Progressions: Predefined classic progressions. Create custom chord sequences, export MIDI files for seamless integration with DAWs including GarageBand, Cubase, Logic Pro and more.
- Guitar Chord Library: 100 chord types with over 2500 fingerings.
- Ukulele Chord Library: 100 chord types with over 1000 fingering diagrams.
- Chord Ear Training: Train your ear to recognize chords step by step, from triads to ninth chords.
- Chord Beginner Courses: Beginner-friendly video tutorials covering basic chords all the way to advanced extended chords.
【Chord Types】
Covers beginner to professional-level chords for pop, classical, jazz and other music genres:
Triads, seventh chords, altered seventh chords, sus chords, added tone chords, ninth chords, altered ninth chords, eleventh chords, altered eleventh chords, thirteenth chords, altered thirteenth chords, power chords, major sixth chords, minor sixth chords, six-nine chords, minor six-nine chords, etc.
【Modal Chord Types】
Diatonic triads, diatonic seventh chords, diatonic sus chords, diatonic added tone chords, diatonic extended chords, other diatonic chords, secondary chords, secondary seventh chords, secondary leading tone chords, secondary leading tone seventh chords.
【User Reviews】
“I can quickly check chord tones and train my ear to identify notes in each chord. It
Latest updates
3.2.0
This update greatly enhances chord tools. New features include the Composition tab, chord construction formulas and floating piano keyboard, with multi-language switching and sound effect controls.
【Overall Interaction Upgrade】
- Tap the piano keyboard or fingering diagram on any page to preview chord audio
- Chord tones are displayed more prominently for easy viewing
- Different colors distinguish the chord root note from other chord tones
- Visual improvements for mode chord markers for better readability
- Guitar and ukulele chords are now on dedicated pages, no need to switch instruments to view
【Chord Detail Page】
- Added chord construction formulas to view detailed steps for building each chord
- Optimized inverted chord section to clearly show notes and finger positions for all inversions
- Improved fingering panel, displaying both left and right hand fingerings with labeled notes
【Mode Chords】
- Added history floating window to view and play recently browsed chords. Create new chord progressions to explore chord combinations efficiently
- Added type tags to quickly filter different mode chord categories
- Piano keyboard and history are now floating windows that can be manually closed
【Composition】
- The original chord sequence page is now an independent 【Composition】tab
- Built-in classic chord progression templates to quickly start new compositions
- Switch between keys to view corresponding chord progressions
- Tap chords and time values directly on the Composition page for editing
- The piano keyboard at the bottom of the Composition page is converted to a manually closable floating window
【Other Additions & Improvements】
- Added Traditional Chinese and English languages, support in-app language switching
- Added reverb and delay effects for more realistic playback sound
- Interface styling optimized, with support for iPad
- Compatible with iOS 27
- Various minor improvements and bug fixes
