# Galton Board App — Probability Demonstrator > Interactive probability demonstrator simulating binomial and normal distributions with stock market data. (iPhone/iPad app by Index Fund Advisors, Inc.) - Source: https://appshunter.io/ios/app/galton-board-app/id6446604966 (this page in markdown: same URL + `.md`) - Developer: [Index Fund Advisors, Inc](https://appshunter.io/developer/914924558) - Category: Education, Games - Price: Free with in-app purchases - Rating: 4.96/5 from 114 App Store ratings · 39 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 68 MB - Languages: English - Released: 2024-02-07 - Data updated: 2026-07-06 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/galton-board-app/id6446604966/reviews.md ## What is Galton Board App? Unlock the power of probabilities and explore the beauty of mathematics in motion with the Galton Board App. This innovative application transforms your mobile device into a dynamic, interactive probability demonstrator that brings centuries-old mathematical concepts to life. The app utilizes your iPhone's and iPad's gyroscope capabilities, creating an immersive experience where the beads appear as if they are rolling around inside your device. The Galton Board was invented by Sir Francis Galton in 1873 to illustrate the binomial distribution. Through our app, we've recreated this educational tool to demonstrate how, with a large number of beads and rows of hexagons, it approximates the normal distribution - a concept known as the Central Limit Theorem. Key Features: • An interactive Galton Board that displays the principles of probabilities and the binomial distribution. • Detailed explanations of related mathematical concepts, including probability theories, independent identically distributed (IID) random variables, regression to the mean, the law of large numbers, the random walk, the Gambler's Fallacy, and more. • A "Stock Market Data" version, simulating the probabilities of a range of historical monthly market returns, and demonstrating their correlation with the binomial distribution. • The 'Historical Monthly Return Beads' featured with the Stock Market Data, where beads fall through the board based on monthly historical returns for a choice of 20 index portfolios. • Pause or slow-motion options to study the bead movement and distribution patterns in detail. The Galton Board App is ideal for statistics, math, and stock market enthusiasts. It is not just an app, it's an immersive, hands-on approach to understanding probabilities, the binomial distribution, and the stock market behavior. Presented by Index Fund Advisors, this app is your go-to educational tool. Download now and embark on a fascinating journey into the world of probabilities and the "law of unreason" as referred to by Sir Francis Galton himself! ## Key features - Interactive Galton Board simulation - Binomial and normal distribution demonstration - Stock market data simulation - Detailed mathematical concept explanations - Pause and slow-motion controls - Historical market return bead simulation ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Stock Market Data | Free | one-time | ## Recent user reviews (10 of 39) All indexed reviews: https://appshunter.io/ios/app/galton-board-app/id6446604966/reviews.md ### 5/5 — Beautiful representation of some of the most fascinating real world math *2025-02-20* This app simulates a Galton board, which is a pegboard that you drop marbles through and they bounce off the pegs and fall into bins. It shows a natural appearance of the famous Bell curve from statistics, and addresses a whole bunch of other math stuff like triangular numbers and Pascal’s triangle in a natural and interesting way. Beautifully done, could be a wonderful teacher’s aid or homeschool resource. ### 5/5 — Great product for stats student and fans *2024-05-14* Love this product. The first time I saw a Galton Board was the the Science Museum in Flushing, NY. My mind was blown. I am so glad that a proper digital version was created. It would be awesome if Index Fund Advisors, Inc. could bring the physical product back. ### 5/5 — Super helpful for my class! *2024-05-08* This app was great for helping me understand the concept of bell curves for a class I’m taking this semester! I’m glad it’s out there for students like me :) ### 5/5 — This app helped me understand bell curves *2024-05-03* Caden Fuentes! Using this app I was better able to understand what a bell curve was and how to read a bell curve! I showed this app to a few of my friends who are in economics and they were just as impressed as I was on how awesome this app was! It helped me learn and studying for a test that had a few bell curves on it! Over all great app! ### 5/5 — Cool! *2024-05-02, version 1.4* Math in motion? Yes, please! ### 5/5 — Great app!! *2024-04-30* Professor used this to demonstrate content in class and it helped me understand it so much better! ### 5/5 — Review *2024-04-24, version 1.4* An amazing review love this app I use it daily! ### 5/5 — Awesome App *2024-04-23, version 1.4* This app is awesome and super easy to use!! ### 5/5 — Amazing and beautifully designed *2024-04-22* This app has many levels. To fully ‘get it’ one has to know quant finance, some distributions theory ( Binomial and Gaussian) and Efficient Markets. The golden bead is what Active investors should simulate and see where they land. That will convert them to index investing. As an aside by tilting your mobile device you can skew the distribution. Fun! The team that must have coded it also did a great job. A must have for quants or even Dads showing their kids that math 🧮 can be fun! ### 5/5 — Super helpful! *2024-04-09* Omg! This app is amazing! Really helpful! Using this app I was able to better understand the use of a bell curve! ## Frequently asked questions about Galton Board App ### What is the Galton Board App? The Galton Board App is an interactive educational tool that simulates the Galton Board, a device invented to demonstrate probability concepts. It uses your device's gyroscope to visually show how beads fall and distribute, illustrating the binomial and normal distributions. ### What mathematical concepts does the app explain? The app explains fundamental mathematical concepts such as probability theories, the binomial distribution, the normal distribution, the Central Limit Theorem, independent identically distributed random variables, regression to the mean, the law of large numbers, and the random walk. ### Does the app have a stock market simulation? Yes, the app features a "Stock Market Data" version that simulates the probabilities of historical monthly market returns for various index portfolios. This helps demonstrate their correlation with the binomial distribution. ### Is the Galton Board App free to use? The app is free to download and use, but it offers in-app purchases for additional features or content. Specific details on what is included in the free version versus paid content are available within the app. ### What devices is the Galton Board App compatible with? The app is designed to utilize the gyroscope capabilities of iPhones and iPads, suggesting it is compatible with these Apple devices. Users should check the app store listing for specific iOS version requirements. ## Version history (last 5 releases) ### 3.0 — 2026-05-29 * Performance updates ### 2.12 — 2026-05-19 * Minor layout updates ### 2.11 — 2026-05-08 * Coin Series categories were updated in the Galton Board ### 2.10 — 2026-04-23 * Additional coin series added to the Market Coin feature * Some zoom issues fixed ### 2.8 — 2026-04-07 * Fixed issue causing coins to not show on the Galton Board ## Apps similar to Galton Board App | App | Rating | Price | Category | | --- | --- | --- | --- | | [Galton Board](https://appshunter.io/ios/app/galton-board/id1419746563) | 4.7 (43) | Free | Education | | [Fractal Generator](https://appshunter.io/ios/app/fractal-generator/id1434904648) | 4.2 (5) | Free | Education | | [Art of Stat: Distributions](https://appshunter.io/ios/app/art-of-stat-distributions/id1564877193) | 4.8 (53) | Free | Education | | [Epicycles](https://appshunter.io/ios/app/epicycles/id6450433959) | 5.0 (2) | Free | Education | | [Art of Stat: Concepts](https://appshunter.io/ios/app/art-of-stat-concepts/id6444956478) | 5.0 (10) | Free | Education | | [Art of Stat: Resampling](https://appshunter.io/ios/app/art-of-stat-resampling/id6448982230) | 5.0 (6) | Free | Education | ## More apps by Index Fund Advisors, Inc - [Index Fund Advisors](https://appshunter.io/ios/app/index-fund-advisors/id914924554) - [Investing for Catholics](https://appshunter.io/ios/app/investing-for-catholics/id6758739546) All apps by Index Fund Advisors, Inc: https://appshunter.io/developer/914924558 ## Related topics [galton board app](https://appshunter.io/ios/topics/galton-board-app) · [galton board](https://appshunter.io/ios/topics/galton-board) · [funds index](https://appshunter.io/ios/topics/funds-index) --- *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 2026-07-06.*