StrandOrgan lets you play Lars Palo's sampleset of the Strand pipe organ of the church in Kalvträsk, Sweden, on a MIDI keyboard attached to your iOS device. The Kalvträsk Church sampleset is provided by Lars Palo under the Creative Commons Attribution-ShareAlike 2.5 license, see 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 8.7

All previous in-app purchase functionality is now included for free. If you would like to sponsor the further development and maintenance of StrandOrgan, please consider purchasing one of our other apps.

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.

Ratings and Reviews

5.0 out of 5
7 Ratings
7 Ratings
filoxeniaknock ,

Thank You

This is amazing! Great work. All your apps are excellent.

organist231 ,


Loved this app! Works well with my MIDI keyboard.

Developer Response ,

I am glad to hear this. Thanks!

Nitpick Pete ,


Very good samples of a gorgeous pipe organ with real ambiance of the chapel. The stops are very responsive and combine perfectly for wide variety of sound textures given the the relatively simple configuration of this particular instrument. Close your eyes and it is easy to imagine you are playing the real deal.
The stock setup is the highest quality of sound, however polyphony needs to be used judiciously to prevent note dropouts and slight popping in the audio. Well thought programming offers several reverb options and even a setting to load a smaller sample rate of the whole instrument which gives much more polyphony at differing sound quality levels. The default setup sounds SO good, I prefer to simplify my playing to keep the high quality...nice to have the options, though.
The demos are impeccably played with traditional tunes hand can help you choose the sound quality settings required for your style of playing. The photos of the church and the keyboard and the stops and several angles of the pipes are wonderful.
I use the Alesis io Dock and an old Roland clone-wheel midi keyboard and have used this app live as an impromptu introduction to my band's last gig. The guitar player finally admitted that the iPad is a real instrument and not just a toy.
I am very anxious to try out the other instruments offered by this developer.


Markus Sigg
563.2 MB

Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.


English, German

Age Rating
Rated 4+
© 2012 Markus Sigg
In-App Purchases
  1. Virtual Keyboard Free
  2. Pitch Shifting Free
  3. Audio Recorder Free


  • Family Sharing

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

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