Most loopers treat “Undo” as a panic button for a missed note. Ryan Aldrich’s UndoLooperGO treats it as a primary performance parameter. Built on a proprietary engine that records every layer independently, the app lets you build a 20-layer wall of sound for a chorus and then — with a single tap — peel back exactly five layers to drop into a sparse verse. Rather than a linear track-by-track recorder, it functions more like a live arrangement tool where your performance history becomes a navigable timeline.
The “GO” version is the mobile-optimized evolution of the original UndoLooper, designed for the high-pressure environment of live performance. It removes the long-press frustration common with hardware pedals by making every command — Record, Stop, Undo, Redo — instantaneous. The Echo Stop feature replaces the jarring digital silence that often plagues mobile looping apps with a musically timed delay tail, so your transitions stay musical even when you’re dropping layers mid-performance.
The real depth of UndoLooperGO is in its Total Session Recall. The app saves your audio along with its entire undo/redo history in a custom .undoloop file, so you can practice a complex arrangement today and pick up exactly where you left off tomorrow — every layer accessible in exactly the state you left it. You can share these files with other musicians so they can deconstruct your layers one by one to see how you built the track. Every function maps to a foot controller via CC or Note messages for hands-free use.
Key features:
- Unlimited Undo/Redo: Every single layer in your session history is independently accessible
- “Back 5” Macro: Instantly drops the last five layers for immediate arrangement shifts
- “Bring It Back” Macro: Restores a loop state if you accidentally clear or undo too much
- Echo Stop: Musically timed delay tail replaces harsh digital cuts for smooth endings
- Zero-Latency Engine: Direct CoreAudio integration for sub-1ms response times
- Non-Destructive Overdubbing: Layers treated as independent stems rather than a flattened file
- Total Session Recall: Custom .undoloop file format saves audio and full undo/redo history
- Standalone and MIDI-Ready: Map every function to a foot controller via CC or Note messages
App price: Free
No in-app purchases: $9.99 UndoLooper Pro
Original release: May 7, 2026 | Latest update: May 7, 2026 (v1.0.0)
