# Swipe to Collapse — A Quantum Wave Game

> A Quantum Wave Game (iPhone/iPad app by JUNNICHI SUKO.)

- Source: https://appshunter.io/ios/app/swipe-to-collapse/id6782883674 (this page in markdown: same URL + `.md`)
- Developer: [JUNNICHI SUKO](https://appshunter.io/developer/572389153)
- Category: Games, Education, Casual
- Price: Free
- Age rating: 4+
- Requires: iOS 26.5 · 7 MB
- Languages: American English
- Released: 2026-07-09
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/swipe-to-collapse/id6782883674/reviews.md

## What is Swipe to Collapse?

Overview
This app displays a real-time simulation of the two-dimensional Schrödinger equation.
A quantum wave function lives on the grid. Its colour is the phase and its brightness is how likely the particle is to be there (|ψ|²). You play by observing it.

Observe
Drag across the field to outline a region, then let go to measure it. The wave collapses by the Born rule — the particle is either found inside your region (it snaps bright there) or not (that area goes dark). Pick a stage and try it freely before starting a game.

Game
Tap Start for a 30-second round. Green particles roam the field and score continuously — the brighter the wave |ψ| where a particle sits, the faster it scores. Observe (drag) to collapse the wave and pile it onto the green particles. Red particles (stage 2+) drain your score the same way, so keep the wave dark around them. Best 3 scores per stage are saved. Tap × to quit.

Z/pZ Lab — position & momentum together
An experimental mode on the finite set Z/pZ, where position and momentum are both finite and the Fourier transform links them. Two strips show \psi(x) and \hat{\psi}(k) at once — drag either one to observe in that basis. The carpet below charts the wave over time; watch the fractal revivals. Switch p, potential, kinetic term, initial state and more.


## Version history (last 2 releases)

### 1.0.1 — 2026-08-13

Addition of paid content
-Stage 3 Tunnel Pack
-Stage 4 Harmonic Pack

### 1.0 — 2026-07-10

No release notes.

## Related topics

[swipe to collapse](https://appshunter.io/ios/topics/swipe-to-collapse)

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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 2026-08-13.*