Swipe to Collapse
A Quantum Wave Game
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Addition of paid content
-Stage 3 Tunnel Pack
-Stage 4 Harmonic Pack
The developer, JUNNICHI SUKO, 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
- JUNNICHI SUKO
- Size
- 7.2 MB
- Category
- Casual
- Compatibility
Requires iOS 26.5 or later.
- iPhone
Requires iOS 26.5 or later. - iPad
Requires iPadOS 26.5 or later. - Mac
Requires macOS 26.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.5 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Harmonic $0.99
- Tunnel $0.99
- Copyright
- © 2026 Junnichi Suko
