*** Note: this is an Audio Unit Effect Plugin (AUv3) which requires a compatible host or DAW to work. ***

Kosmonaut is Multitap Delay with a twist. In addition to adding echoes to your audio, it packs a bunch of extra tools to put your music in space:

- Tape looper with with variable sound-on-sound decay level
- 4-Tap Delay (placed in series for complex feedback loops)
- LP/HP filters with LFO
- Autopanner
- Ambiance Generator
- Haas Effect Processor (aka 'wavefront precedence effect')

All features are demonstrated extensively in a ton of factory presets, and you can easily add your own user presets, which will automatically carry over across different host apps.

All variables are exposed as AU Parameters in hosts which support automation.

It also has a smart Random-feature, which may come up with usable results :-)

Check out for the user manual and audio demos.

What's New

Version 1.0.2

- Fixed minor Autopan issue

Ratings and Reviews

5 out of 5

6 Ratings

6 Ratings

The first traditional AU effect from Bram Bos is an unquestioned must buy.


The AU MIDI apps Bram Bos has put out for iOS are some of the most popular & useful apps available for iOS musicians. This new delay is in that exact same mold, the sound quality is incredible and the amount of control over delay timing and tone is insane. At this price it’s a must buy tool every iOS producer needs in their toolkit. Highly recommended.

Hands down, no contest, BEST delay plugin ever!


Not just on iOS, this kicks the crap out of VST delays, hardware delays, etc... it’s just about perfect...

Drive the input stage for saturation, amazing control of head position and behavior, haas effect?!?! Srsly?!? Amazeballs!!!

I’d rather buy this app an an iPad to run it on than spend $300 on a high end delay pedal... and I have literally thousands of dollars in delay pedals and rack effect.

Excellent Delay processor

Ase o/m/g

Thoughtful interface design, good manual controls and factory presets. It’s apps like this that continue to make the iOS platform a force to be reckoned with regards to music creativity. -M.


Bram Bos
3.7 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018, Bram Bos / Ruismaker


  • Family Sharing

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

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