# Galaxy Collider

> Pocket universe simulator for galaxy collision physics. (iPhone/iPad app by Angisoft.)

- Source: https://appshunter.io/ios/app/galaxy-collider/id301086225 (this page in markdown: same URL + `.md`)
- Developer: [Angisoft](https://appshunter.io/developer/301086229)
- Category: Entertainment, Education
- Price: $0.99
- Rating: 3.90/5 from 17 App Store ratings · 41 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 11 MB
- Languages: American English
- Released: 2009-01-13
- Data updated: 2026-08-13
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/galaxy-collider/id301086225/reviews.md

## What is Galaxy Collider?

Galaxy Physics in your pocket! 

Galaxy Collider simulates the universe in your pocket. So brace yourself for the collision of the Milky Way with the Andromeda Galaxy!

Galaxy Collider simulates the physics of interacting galaxies by computing the gravitational forces between the stars and the heavy galaxy centers.

Galaxy collider features a high performance particle engine that can interactively visualize spectacular galaxy interactions. It uses OpenGL point sprites for rendering thousands of high-quality stars at high frame rates.

The parameters of the simulation, such as the number of galaxies and stars, masses, etc. can be changed interactively to explore the infinite number of possible interactions between the galaxies.

Galaxy collider uses the build-in accelerometer of IPhone or IPod touch to change viewpoints add real external forces to the simulation.

For further information about interacting galaxies check out the Wikipedia article at http://en.wikipedia.org/wiki/Interacting_galaxy)

## Key features

- Galaxy collision simulation
- Gravitational force computation
- High-performance particle engine
- Interactive visualization
- Adjustable simulation parameters
- Accelerometer control

## Recent user reviews (10 of 41)

All indexed reviews: https://appshunter.io/ios/app/galaxy-collider/id301086225/reviews.md

### 3/5 — 3

*2026-08-05*

A bit disappointing why the galaxy explode after collision please can you update that?

### 3/5 — Galaxy not even colliding

*2024-08-22*

Please make galaxy’s collide when I add galaxies they’re not colliding very bad ☹️☹️☹️☹️☹️

### 3/5 — Blinding.

*2016-11-09*

I like this app a lot, I think. 
But I'm blinded by the white bar across the bottom. I hold my hand over it to watch but get tired of bothering. Hide that bar and I'll give it another try.

### 2/5 — Touted controls nonexistent

*2016-03-04*

I simply tried to slow the simulation down and there was no way to do it. It says in the help that you can tap on the upper left part of the screen to bring up the settings and that there is a slow motion slider somewhere. I tapped 1000 ways to Tuesday and no settings came up.I could not find The slow-motion slider anywhere and is not in the settings anywhere.

 So unless you just want to watch galaxies collide at top speed leaving you little or no Ability to see watch what's going on don't bother downloading this app!

### 4/5 — Could use dark matter hall simulator

*2016-01-06*

It's quite a beautiful and rather accurate simulation of galaxy mergers. In answer to two other reviews of the current version, there is an option to increase or decrease the amount of time between each reset, along with allowing the simulation to run without reset.

 Also, the disintegration of the galaxy occurs when the black holes at the centers of each galaxy merge and rocket into a random direction faster than escape velocity. This only happens in galaxy simulations with low or no dark matter halos.

Dark matter also effects the shape and rotation of the stars, themselves. Without DMH, the stars will rotate as in this simulation, swirling like water around the central black hole, with the outer stars rotating significantly more slowly than the inner stars. With the inclusion of DMH, the outer stars rotate at about the same rate as the inner stars due to the gravitational influence of the halo. This causes the spiral shape and stellar velocities that are actually observed in spiral galaxies. 

Dark matter may also contribute to the shape or formation of central bulge in galaxies. Adding this feature (no idea how feasible from a coding standpoint) could potentially make this app more realistic that it even already is.

### 1/5 — I don't think it was worth it

*2015-11-23*

The galaxies that i set were the largest possible, i tried two at first then progressively got to 5 at a time. It was pretty neat watching them collide with each other. One of the problems i think it has is that after a certain period of time elapsed the galaxies would reset whether or not they had collided yet or not. Also after they collide completely the entirety of each galaxy disappears. Not trying to bash this app, it is interesting and fun to play around with but it needs some fine tuning and additional settings to make me feel like i didn't just buy an app that i will uninstall and never use again. If anything get the lite version and play around on it for free.

### 4/5 — Amazing but could use more parameters.

*2015-05-06*

I love this app I personally find it very entertaining! I would, however, like more options such as a much higher particle limit, Galaxy thickness and type, The ability to change constants such as gravity, speed of light, etc... I have also come across whet I think is a bug. If you let the simulation run for a long time all of the stars just suddenly disintegrate :(.

### 4/5 — ミニ銀河

*2015-04-14, version 1.52*

銀河の数、星の数、背景、速度を設定して観賞するアプリであり、それだけでもあります。
天井のしみや壁の模様をボケ〜と見るような人にオススメです。

### 5/5 — stabil und schnell

*2014-03-15, version 1.51*

On my 3GS it works fine, fast and impressing, tested with several settings 
Laeuft stabil und schnell, auch mit 1000 Sternen.

### 1/5 — ?????

*2013-01-13, version 1.51*

Worked for 1 day now it shows a black screen n it won't do anything

## Frequently asked questions about Galaxy Collider

### What does Galaxy Collider do?

Galaxy Collider simulates the physics of interacting galaxies, allowing you to witness and explore spectacular galaxy collisions. It computes gravitational forces between stars and galaxy centers to create realistic cosmic interactions.

### What are the key features of Galaxy Collider?

Key features include a high-performance particle engine for visualizing thousands of stars, interactive control over simulation parameters like the number of galaxies and stars, and the use of the device's accelerometer to change viewpoints and add external forces.

### Is Galaxy Collider free to use?

Yes, Galaxy Collider is available for free. There are no in-app purchases or advertisements mentioned in the provided description.

### What devices is Galaxy Collider compatible with?

The description specifically mentions compatibility with iPhone and iPod touch devices, utilizing their built-in accelerometers for control.

### What are some common use cases for Galaxy Collider?

Users can explore the physics of galaxy interactions, visualize the collision of galaxies like the Milky Way and Andromeda, and experiment with different simulation parameters to understand cosmic dynamics. It's also useful for educational purposes related to astronomy and physics.

## Version history (last 5 releases)

### 1.60 — 2018-03-19

This app has been updated by Apple to display the Apple Watch app icon.

- Added iPhone X support.
- Increased default and maximum number of stars per galaxy.

### 1.52 — 2014-09-30

- iOS8 compatibility
- support for iPhone 6 and 6 Plus
- bug fixes

### 1.51 — 2012-09-19

- iPhone 5 support
- reduced iOS version requirements

### 1.42 — 2011-12-04

Added spiral galaxies.
Rotation center is now the center of all galaxies.
Fixed a bug that could crash the App when the number of galaxies is changed.

### 1.40 — 2010-06-29

Added high resolution rendering support for iPhone 4

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## More apps by Angisoft

- [Quaternion Julia Raytracer](https://appshunter.io/ios/app/quaternion-julia-raytracer/id321524703)
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- [Galaxy Collider HD](https://appshunter.io/ios/app/galaxy-collider-hd/id363370764)
- [Mandelbulb Raytracer HD](https://appshunter.io/ios/app/mandelbulb-raytracer-hd/id364084851)
- [Quaternion Julia Raytracer HD](https://appshunter.io/ios/app/quaternion-julia-raytracer-hd/id364095409)

All apps by Angisoft: https://appshunter.io/developer/301086229

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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.*