OttOrgan lets you play the Ott-Orgel sampleset of Christian Datzko on a MIDI keyboard attached to your iOS device. The Ott organ is a house organ with five ranks at one manual plus attached pedal. If you would like to use the sampleset with other software, you can get it at

For more information, please consult the app support page , the Napo documentation at and in particular the Napo user manual at .

For hearing sound examples of the app, please visit the support page .

What's New

Version 6.7

Upgraded to Napo 4.20:

- Improved Launchpad support.
- Support for button lamps in Hoffrichter and Pausch-e consoles.
- Adaptions for iPhone X.
- Support for Slide Over and Split View (on suitable devices).
- Adapted the layout of the stop buttons in the portrait mode of the virtual keyboard view to the layout in the landscape mode.
- Option to disable sustain pedals.
- Option to disable warnings about unexpected note-on/off messages.
- Bugfixes regarding stuck notes during the use of a sustain pedal or when changing the transposition.
- Corrected the ordering of the buttons Prev Bank/Next Bank and Prev Comb/Next Comb in the Launchpad default setting.


Markus Sigg
322.1 MB
Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.
English, German
Age Rating
Rated 4+
© Markus Sigg


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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