Loop Builder is a Groovebox-like sampler tool, that also lets you sequence songs. Tap and slide to record beats, melodies, and sample automation. You can record your finger performances with perfect time correction, or Free Quantization. You can also assign 1 of 4 AUv3 effect busses.

Cut through samples, and makes beats and melodies. Unlimited samples can be loaded and automated, with AUv3 effects, and recorded as a bank of sequences. Make music! Make beats! Get nasty!

What’s New

Version 2.1.4

- [Fix] Save/load bug.

Ratings and Reviews

3.9 out of 5
7 Ratings

7 Ratings

T.j.V. ,

Novel sample mangler

I’ve updated my review to 4 stars after a short email exchange.

I’ll start off with a couple key things are missing.

1) AU3 compatibility (preferably multi out)
2) no internal sample recorder

Give me those two things and I would give five stars.

I like that the hands-on process is very free flowing and the samples are easy to manipulate. There are a lot of parameters to automate, but there no effects to process your samples further (ie reverb, delay, flanger, etc).

If I could load this inside AUM, especiallly with multi out capability, there would be so much more that could be done with the samples.

As it is right now, there are some solid entertainment possibilities. Unfortunately, the process stops short of something that I can figure out how to integrate into my workflow. I wouldn’t call this a toy, but I do think there are some missing features that would make this become a regular part of my sample mangling routine.

whyshouldi? ,

Bought it - after your fixes.

Seems to do better time correction better than others, and I assume it can advance automatically through sequences unlike one other popular looper I have but will not mention.

Important: it seems that the bug went away from the lite version but showed up in the paid version. I fixed it by deleting both and re- installing the paid version after a iPad shutdown. I would suggest if you are going to buy it you delete the lite version first.

AudioGman ,

Needs Ableton Link

Please add Ableton Link ability to this app. It is not too bad when you are trying to use it with other apps that have some other functionality that this app does not have but having Ableton Link will at least allow it to sync with the other apps.


James Navarro
57.7 MB

Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

More By This Developer

You May Also Like