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Scales Tutor for iPhone, version 2.1, which works with iOS 10 and Scales Tutor (for iPad) are available at the App Store.
                            For iPad, iPhone and Android

  Scales Tutor for iPad     
  Scales Tutor (for iPhone)
https://play.google.com/store/apps/details?id=com.musikeys.scalestutor   Scales Tutor (
for Android)

Piano Technical Exercises: Interactive!  
https://itunes.apple.com/us/app/superscore-music/id1000377224?mt=8

https://sites.google.com/a/musikeys.com/musikeys-theory-apps/home/piano-technical-exercises-interactive