iPhone Screenshots


You can now practice over II-V-I progressions and selected chords and scales using the key shift option. For example, you can choose the II-V-I progression descending in whole tones to give you the "Cherokee" bridge or the first section of "How High The Moon", or you can just set it to the particular key that you find the most challenging. Alternatively, you could choose a dominant chord and play it continually descending in semitones ("Lover") or round the cycle in all keys ("I Got Rhythm", follow key shift and clockwise after 2 bars). VI-II-V-I will give you "Fly Me to the Moon" or the first four bars of "All the things" in all keys.

What’s New

Version 2.2.0

Updated for iOS 11

Ratings and Reviews

Mario93-93 ,

Great app

I have just discovered and started to use this very useful app. It has opened up my understanding of music massively and I now practice having fun. Highly recommended

Raaargh!!! ,

Amazing app

I knew practically no music theory before using this app but was immediately able to improvise around complex jazz progressions in all keys and this app is by far the greatest tool I have encountered so far in my journey to become a musician that to date has included 6 different music teachers. Brilliant!

McKuen ,

Nice idea, but needs development

I can see how this could be very useful, but at the moment it still needs a lot of work. I'd like to be able to set which progressions I want to practice, for example ... Just II-V-I, say, or rhythm change progressions. And a decent backing track would be nice. Good start though.


Bernard Holden
12.2 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
Rated 4+
© Bernard Holden


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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