Apps by 乃君 黄
Galton Board - Bean Machine app icon

Education

Galton Board - Bean Machine

乃君 黄

Free download 3.82 · 1 storefront · 11 ratings In-app purchases unconfirmed
Open on Apple

About this app

This app is a digital replica of the Galton Board, a device designed to demonstrate the central limit theorem. 

Just put your phone upright, you can watch how the balls fall, hit pegs, take different paths, and eventually fall into different bins at the bottom. 

In the end, you will find the bins in the middle hold more balls than those on the sides.

Latest release

What’s New

Version 2.0.0 Dec 1, 2019

fix bugs

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
11 ratings
11 Aug 11, 2026 · 11 ratings Aug 11, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 11, 2026 · Free Aug 11, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 11, 2026 · 7:33 PM Free

Screenshots

Galton Board - Bean Machine iPhone screenshot