# Swipe to Collapse

> A Quantum Wave Game

Canonical page: [https://chrome-stats.com/d/id6782883674](https://chrome-stats.com/d/id6782883674)

## Overview

- **ID:** `id6782883674`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** JUNNICHI SUKO
- **Category:** Casual
- **Version:** 1.0.1
- **Last updated:** 2026-08-13
- **First published:** 2026-07-09
- **Size:** 6.83 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/swipe-to-collapse/id6782883674)
- **Privacy policy:** [https://eizouasobi.blogspot.com/2026/07/privacy-policy-for-swipe-to-collapse.html](https://eizouasobi.blogspot.com/2026/07/privacy-policy-for-swipe-to-collapse.html)

## Description

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.

## Rankings

- #1,694,311 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6782883674)