Varispeed Simulator
Pitch and Speed Oscillator
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Varispeed—or variable speed oscillation—is a feature on many old tape machines which allows users to manually adjust the speed and pitch of a recording, often with a dial. The slower the tape runs, the slower the recording is, and the lower it is in pitch. The faster the tape runs, the faster the recording is, and the higher it is in pitch.
Other popular digital Varispeeds exist as external plugins or gated off, subscriber-only features of apps; this standalone Varispeed Simulator is the first of its kind for iOS, and it’s free!
This first build features:
-An intuitive user interface and hand-drawn design.
-The ability to upload and manipulate the speed and pitch of any audio.
-A pitch detector which displays major and minor keys.
-A real-time audio scrubber.
-An audio reversal tool.
-The ability to export Varisped audio!
-New import audio button added that keeps users from having to close and re-open the app to upload new audio.
-Reversed audio is exportable.
-Improved key detection.
-Bug with export button fixed.
-Misc. bug fixes.
The developer, Morgan Troper, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Morgan Troper
- Size
- 3.3 MB
- Category
- Music
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Morgan Troper