Schlap is a characterful, colourful and aggressive sounding program-dependent AUv3, IAA & standalone compressor. It takes inspiration from hardware RMS compressors of the past and evolves them into a modern setting. If you want your tracks to be energetic, in-your-face and bold, make ‘em ‘Schlap’.

The compressor uses a program-dependent attack and release influenced by old hardware which makes the compression sound characterful and dynamic.

The RMS detection means that Schlap detects the average loudness of a signal, resulting in sudden short peaks being uncompressed so that they can attack hard and sound heavy hitting. Also inherently in RMS detection, there is a slight delay in compression which allows the initial, early transients to sneak through uncompressed so they keep their punch.

You’ve got a safe, controlled track you think you’re happy with, but you have to ask yourself… ‘Does it Schlap?’

Schlap is both a stand-alone application as well as an AUv3 plugin, meaning it works within iOS and iPadOS hosts such as GarageBand.

What’s New

Version 1.0.1

Bug Fix: Fixed audio glitches in filters when variable buffer sizes are used.

Ratings and Reviews

4.9 out of 5
8 Ratings

8 Ratings

Napalm is Fiiiyah ,


This is my new go to compressor. Love the presets. Very easy to dial into the sweetness you’re after. Money well spent. Looking forward to future apps by this developer.

Codowlsky Polopumus ,

Love it. Just simple enough

Found that perfect fine line between simplicity and “feature packed” (mess).

Love it

Lemon Berries ,

Schlap happy

Great sounding compressor very intuitive interface

App Privacy

The developer, Caelum Audio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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