What's New

In this version we finalized the transition to a full general MIDI sound library. Some outstanding issues were fixed as well and ChordLab gets a new icon.

App Description

Harmony is a difficult and complex part of music theory with chord spelling and construction at its very basis. What is a chord? Is it C - E - G# or C - E - Ab? You like the sound of those four notes on your guitar, but is it a chord? And if so, what is it called? These are typical issues facing the creative musician when trying to bring a new song to paper. Music theory is often complex and correctly spelling a chord that may have sharps and flats, double flats or double sharps is not always easy. This is where the traditional chord books and apps become useless and ChordLab steps in.

ChordLab differs in its top to bottom approach that begins with a basic chord form which can then be put through permutations like inversions and different voicings. It features all the standard voicings commonly used in Jazz, Rock, Pop, and elsewhere. In that sense it serves as a color palette or sounding board that automatically generates valid fingerings for the piano and guitar in addition to the correct music notation. The result is a much deeper and better understanding of the underlying principles of harmony.

The chord finder feature in ChordLab allows you to input 3 or 4 notes to determine their harmonic quality. ChordLab will always find the enharmonically simplest solution and does not require you do know whether a note is called G# or an Ab. C-Gb-Bb-D for example will resolve to a D aug7 chord with a correct spelling of C-F#-A#-D. This is especially useful for guitarists that seldomly encounter chords in root position due to the tuning of the instrument.

Another essential tool found in ChordLab is the Circle of Fifths which is implemented interactively. It not only allows to look up key signatures for major and minor, but all major modes like dorian, phrygian, etc. Additionally ChordLab displays degree structures for a key in standard Roman numerals. This is extremely useful when putting together chord progressions.

ChordLab addresses the needs of a somewhat advanced audience with a sharp focus on elementary areas like chord spelling, voice leading, four-part reduction and similar topics that are so essential to many modern music styles. By simultaneously addressing both main harmony instruments in modern music it also becomes an invaluable tool to the composer/arranger of today that needs to evaluate the playability of certain voicings. In short, ChordLab goes far beyond the generic chord app that only aims to show a diagram or two. While providing valuable fingering information - albeit in a context firmly based in theory - with its included interactive circle of fifths, chord finder, rating system, history, tunings adaptation and so many other features, ChordLab is the one harmony tool one finds oneself coming back to again and again.

• supports all common chords
• chord finder finds correct chord descriptions for triads and seventh chords
• music notation and textual representation of chord tones
• American or European chord notation
• fingering display for piano and guitar
• alternate fingerings for guitar where available
• adjustable tuning for guitar instrument
• alto, bass, tenor, treble clefs, TAB and grand staff
• all possible inversions
• all standard voicings
• automatic reduction to 3 or 4 voices
• automatic root and fifth substitution
• key signatures for all major modes (circle of fifths)
• degree structure in Roman numerals for all major modes (circle of fifths)
• high quality guitar and piano samples
• arpeggiated playback
• support for left-handed players
• ready for Retina®

App Support: We cannot respond to comments and feedback on the App Store. If you face any issues with ChordLab, please email them to [email protected] We assure you it will be taken care of immediately.

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iPhone Screenshots

(click to enlarge)

ChordLab screenshot 1 ChordLab screenshot 2 ChordLab screenshot 3 ChordLab screenshot 4 ChordLab screenshot 5

App Changes

  • June 16, 2014 Initial release
  • August 28, 2014 Price decrease: $14.99 -> $9.99
  • August 31, 2014 New version 3.1.4
  • September 01, 2014 Price increase: $9.99 -> $14.99
  • September 17, 2015 New version 3.2.2
  • September 17, 2015 Price increase: $14.99 -> $19.99
  • October 09, 2015 Price decrease: $19.99 -> $14.99
  • November 15, 2015 Price decrease: $14.99 -> $9.99
  • November 28, 2015 Price decrease: $9.99 -> $4.99
  • December 01, 2015 Price increase: $4.99 -> $9.99
  • December 13, 2015 Price increase: $9.99 -> $14.99
  • December 16, 2015 New version 3.2.3
  • December 17, 2015 Price decrease: $14.99 -> $4.99
  • December 23, 2015 Price increase: $4.99 -> $14.99
  • December 25, 2015 Price decrease: $14.99 -> $7.99
  • January 05, 2016 Price increase: $7.99 -> $14.99
  • February 28, 2016 Price decrease: $14.99 -> $8.99
  • February 29, 2016 Price increase: $8.99 -> $14.99
  • July 10, 2016 New version 3.2.4
  • November 08, 2016 Price decrease: $14.99 -> $9.99
  • November 11, 2016 Price decrease: $9.99 -> $7.99
  • November 12, 2016 New version 3.2.5
  • June 15, 2019 New version 3.2.7
  • June 15, 2019 Price increase: $7.99 -> $9.99
  • June 16, 2019 Price increase: $7.99 -> $9.99