# UPISketch4

> UPISketch4 (iPhone/iPad app by Rodolphe Bourotte.)

- Source: https://appshunter.io/ios/app/upisketch4/id6761500631 (this page in markdown: same URL + `.md`)
- Developer: [Rodolphe Bourotte](https://appshunter.io/developer/1333253948)
- Category: Music, Education
- Price: $11.99
- Age rating: 4+
- Requires: iOS 12.0 · 42 MB
- Released: 2026-04-14
- Data updated: 2026-08-25
- User reviews in markdown: https://appshunter.io/ios/app/upisketch4/id6761500631/reviews.md

## What is UPISketch4?

UPISketch is a composition tool that keeps the principle of “pitch versus time” of the classical score, extended in the continuous domain. It allows for freely drawing absolute pitch curves applied to existing sounds. It uses granular synthesis. It can be used to sketch musical ideas, try alternative scales (divisions of the octave), and more.
It is inspired by the famous UPIC machine that was invented in 1977 by Iannis Xenakis and the CEMAMu engineers.
Version 4 introduces significant changes: improved sound quality, sequence recording, and a magnetic grid feature.


## Version history (last 1 release)

### 4.0.3 — 2026-04-14

No release notes.

## More apps by Rodolphe Bourotte

- [UPISketch](https://appshunter.io/ios/app/upisketch/id1389444597)
- [UPISketch2](https://appshunter.io/ios/app/upisketch2/id1461075546)
- [UPISketchPlay](https://appshunter.io/ios/app/upisketchplay/id1586866304)

All apps by Rodolphe Bourotte: https://appshunter.io/developer/1333253948

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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 2026-08-25.*