# SUS4 Loop Builder — A loop at a time. A song.

> A loop at a time. A song. (iPhone/iPad app by ThePaulSmith.)

- Source: https://appshunter.io/ios/app/sus4-loop-builder/id6777230284 (this page in markdown: same URL + `.md`)
- Developer: [ThePaulSmith](https://appshunter.io/developer/319584506)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 19 MB
- Languages: American English
- Released: 2026-06-17
- Data updated: 2026-07-27
- User reviews in markdown: https://appshunter.io/ios/app/sus4-loop-builder/id6777230284/reviews.md

## What is SUS4 Loop Builder?

Build a song one loop at a time.

SUS4 Loop Builder is a multi-track looper for building song ideas from scratch. Record a bass line into the first layer, layer a chord progression over it, add a melody on top, and keep going until the idea has a shape. Each layer has its own level and effect controls so the mix develops as you build.

When you have something, export the full mix or individual stems to your DAW for proper production. The loop library saves your builds so you can come back to them, reference them, or share a stem with a collaborator.

• Multi-track looping — record and layer on top of previous loops
• Per-layer level and effects controls
• Loop library for saving and revisiting ideas
• Stem export — export individual layers or the full mix
• Multi-track export to your DAW
• Subscribe monthly, or unlock the full SUS4 suite forever: unlimited loops, multi-track export, per-layer effects, and the full loop library

All recording stays on your device. No audio is uploaded.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SUS4 Loop Builder Pro Monthly | $0.99 | per month |
| SUS4 All-Access | $4.99 | per month |



## Version history (last 2 releases)

### 1.1.0 — 2026-07-06

Every advertised feature is now fully functional, Pro genuinely unlocks real features, and the new SUS4 All-Access pass unlocks all 24 SUS4 apps with a 7-day free trial. Faster and clearer throughout.

### 1.0 — 2026-06-18

No release notes.

## More apps by ThePaulSmith

- [iScrobble Pick And Mix](https://appshunter.io/ios/app/iscrobble-pick-and-mix/id319584503)
- [iSwipeMusic](https://appshunter.io/ios/app/iswipemusic/id334689181)
- [iShuffleAlbums](https://appshunter.io/ios/app/ishufflealbums/id335009718)
- [iBreathalyzer](https://appshunter.io/ios/app/ibreathalyzer/id369686249)
- [SUS4 Pitch Pipe](https://appshunter.io/ios/app/sus4-pitch-pipe/id6777229584)
- [SUS4 Chord ID](https://appshunter.io/ios/app/sus4-chord-id/id6777229621)

All apps by ThePaulSmith: https://appshunter.io/developer/319584506

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-27.*