Mehegan Jazz Harmony at Mac App Store analyse

App power index: 140 (based on ranks around App Stores today)
Music Education
Developer: Norman Schmidt
Price: 0 free
Current version: 1.2, last update: 7 years ago
First release : 02 Nov 2014
App size: 12.88 Mb
4.2 ( 4512 ratings )
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Estimation application downloads and cost

> 3.08k
Monthly downloads
~ $ 1.26k
Estimation App Cost


John Mehegan (1916-1984) was a jazz pianist, critic, educator and author of many books on jazz. He came up with this unique style of roman numeral notation that represents a harmonic approach to jazz facilitating transposition in all keys.

This app demonstrates how the Mehegan system works by showing regular chord notation with equivalent roman numerals side by side. Real-time modification of chords can be done in all keys.

A second page allows viewing roman numeral chord charts from the iReal Pro app (a paid app that must be installed separately). In order to import into Mehegan you need to go the iReal Pro and share a chart using the "Open in..." option or by pasting it to the clipboard.

When using the Mehegan App with iReal Pro certain text entries are used for key changes. In the iReal Pro app, these have to be typed in at the beginning of the staff text entry for any chord where a key change takes place. For example, "/1/" tells the chord progression to move up a full step, "3" down a major third, etc. For more information on this as well as numerous examples, including Rousseau notation, check out the examples on the supporting web page and John Mehegans books.
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Available in countries
Country Price
Canada free
China free
France free
Germany free
Italy free
Netherlands free
Portugal free
Spain free
Poland free
UK free
India free
Japan free
Korea, Republic Of free
Poland free
Russia free
Turkey free
USA free
Korea, Republic Of free
Ukraine free
Available for devices
iPhone4, iPad2Wifi, iPad23G, iPhone4S, iPadThirdGen, iPadThirdGen4G, iPhone5, iPodTouchFifthGen, iPadFourthGen, iPadFourthGen4G, iPadMini, iPadMini4G, iPhone5c, iPhone5s, iPadAir, iPadAirCellular, iPadMiniRetina, iPadMiniRetinaCellular, iPhone6, iPhone6Plus, iPadAir2, iPadAir2Cellular, iPadMini3, iPadMini3Cellular, iPodTouchSixthGen, iPhone6s, iPhone6sPlus, iPadMini4, iPadMini4Cellular, iPadPro, iPadProCellular, iPadPro97, iPadPro97Cellular, iPhoneSE, iPhone7, iPhone7Plus, iPad611, iPad612, iPad71, iPad72, iPad73, iPad74, iPhone8, iPhone8Plus, iPhoneX, iPad75, iPad76, iPhoneXS, iPhoneXSMax, iPhoneXR, iPad812, iPad834, iPad856, iPad878, iPadMini5, iPadMini5Cellular, iPadAir3, iPadAir3Cellular, iPodTouchSeventhGen, iPhone11, iPhone11Pro, iPadSeventhGen, iPadSeventhGenCellular, iPhone11ProMax, iPhoneSESecondGen, iPadProSecondGen, iPadProSecondGenCellular, iPadProFourthGen, iPadProFourthGenCellular,