PaulXStretch

Name: PaulXStretch
Rating: 4.9 (72 reviews)
Author: Sonosaurus LLC

By: Sonosaurus LLC App

Extreme Time Stretching

Overview

Version:

1.6.1

Last updated: 2022-11-28

Ranking

#167,842 ▼ 5,026

Overall

Features & Capabilities

PaulXStretch is a free app and AUv3 plugin implementing the PaulStretch algorithm (Paul's Extreme Time Stretch). Its updated UI is optimized for different platforms and screen sizes, and it excels at radical sound transformation—ideal for ambient sound design. It can turn any short audio into hours-long soundscapes, with input through Capture or by loading files. After tweaking parameters, choose a slice to process and loop, press play to hear the effect, and render offline or record live to capture the result. Saved audio can be accessed or shared from the Files app.

The AUv3 version offers the same capabilities with live input, enabling internal capture for stretching. This software is free to use; the UI has been adapted across platforms. Note: it's designed for dramatic transformations rather than subtle corrections, making it perfect for ambient textures and experimental sound design.

User Growth & Download Statistics

App Music & Audio

By:

Sonosaurus LLC

Rating:

4.90

(72)

Version:

1.6.1 Last updated: 2022-11-28

Version code:

848308349

Creation date:

2022-11-28

Compatible devices:

Size:

16.83MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-07-20

Compare stats and ranking:

Ranking

# 167,842 ▼ 5,026

For Developers

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Contact the developer

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Developed by:

Sonosaurus LLC

Apple Apps Store

https://apps.apple.com/us/app/paulxstretch/id1619014008

Website:

https://sonosaurus.com/paulxstretch

User Reviews

PaulXStretch is praised for its capability to produce ambient and experimental sounds on iOS, with users highlighting its powerful sonic options, portability, and the fact that it’s free. The app has been revived and supported by new developers, preserving a classic tool for mobile sound design. Some users note a steeper or less desktop-like workflow on mobile, and a few requests for desktop-like features (e.g., window shapes). Overall, it’s valued by ambient/drone enthusiasts as a flexible, free mobile plugin.

Pros

Excellent ambient, drone, and experimental sound creation with rich, flexible sounds.
Free to use on iOS.
Portable on iPhone for sound design and experimentation away from a desktop.
Recently revived and actively supported by the developers (Sonosaurus).

Cons

Recent reviews

It’s quite astounding what this can do. I know of no other app or device which can manipulate the speed of a track like this without aliasing. Two thumbs up.