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 2.4

- [Added] Background audio mode.
- [Adj] Adjusted wave views.
- [Fixed] Crash on samples over 16.

Ratings and Reviews

4.1 out of 5
9 Ratings

9 Ratings

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.

andy_marks ,


There are other loop based apps but Loop Builder is easy to use.Thanks for making this app possible.Keep up the good work.

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.

Developer Response ,


App Privacy

The developer, James Navarro, 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


James Navarro
80.2 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.

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