Galton Board 4+

Probability theory simulator

Edwin Veger

Designed for iPad

    • 4.6 • 38 Ratings
    • Free

Screenshots

Description

Originally conceived in 1894 by Galton, the board consists of countless balls traversing down through a maze of pins. At every pin, they have a single choice: go left or right.
Although the possibilities seem limitless, a pattern soon emerges. But how does this really work?

This app is a simulation of the famous Galton board and is intended for educational purposes. You can adjust the board size, and send over a thousand balls bouncing down the board. On iPad you can even run multiple simulations simultaneously with multiple windows.

The results are visualized by a bar chart. The Galton Board is closely related to Pascal's Triangle, Newton's binomium and probability theory in general.

For experiment fidelity and performance, the balls do not collide with each other.

I hope this app helps people grasp chance at least a little bit better.
Love the app, or have improvements/suggestions? Let me know!

What’s New

Version 2.0.1

We've polished the balls, so they zoom down the board smoother than ever.

Ratings and Reviews

4.6 out of 5
38 Ratings

38 Ratings

Thejdoggy ,

Very nice

Good representation of the theory.

Danpianoman ,

Please fix the math! It’s misprogrammed but love the idea!

I want to give this app five stars, but after 20 trials, it’s incredibly clear that it has been misprogrammed. for example, you will always see a higher number than expected of balls on the outside, which should average out to 1/8, 1/16, 1/32, 1/64 depending on how many rows.

Developer Response ,

Hi Dan, thank you for bringing this to my attention. I was able to reproduce the issue, and it has been resolved in the latest release.
- Edwin

tabaks ,

Tedious gimmick

Why in the world wasn't this app written so we can EASILY enter ANY NUMBER?

Developer Response ,

Hi tabaks, thanks for your feedback. In the next release, you can tap the top number to manually enter any amount.

App Privacy

The developer, Edwin Veger, 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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