Learn all piano chords and listen how it sounds.

update iOS17

- iOS 15 Support
- Quiz question button enhanced

- All iPads are supported and optimized for Landscape Mode
- Midi input via cable or Bluetooth
- Quiz Mode sorted and made for Beginners
- Notes system is now active in all Modes

- iOS 10 compatible
- error in the mode button display fixed
- Crash when orientation has changed quickly
- ChordPainter is showing the chord names in the image correct
- Minimum OS is now set to iOS 8.0
- added 64 bit support