Probability vs Galton Board
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Probability
Calculate probabilities, find percentiles, and visualize probability density or mass functions for a wide range of continuous and discrete statistical distributions. Explore common distributions like normal, binomial, Poisson, and many more.
- Compute probabilities
- Determine percentiles
- Plot probability density function
- Plot probability mass function
- Supports 10+ continuous distributions
- Supports 5+ discrete distributions
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Replace your statistical tables with an interactive, graphical app! Compute probabilities & percentiles, and plot the probability density/mass function for the normal (Gaussian), t, chi-square, F, exponential, gamma, beta, log-normal, and Uniform, binomial, geometric (2 versions), hypergeometric, Poisson, and negative binomial (2 versions) distributions. Now supports Español.
Galton Board
Explore probability theory with a simulation of the classic Galton board. Adjust board size, send numerous balls through a pin maze, and observe emergent patterns visualized in a bar chart. Ideal for educational purposes, it helps grasp concepts of chance and their relation to Pascal's Triangle.
- Galton board simulation
- Adjustable board size
- Simulate over a thousand balls
- Bar chart visualization of results
- Educational tool for probability
- Related to Pascal's Triangle
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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!
Screenshots
Verdict
The clearest difference is price: Galton Board at Free against Probability's $1.99. Galton Board also leads on iOS requirement (16.0 vs 26.0). Probability's advantage is review sentiment (97% vs 60%) and rating (4.9 vs 4.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Galton Board is free to download; Probability costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Probability holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 193 and 44 respectively. Written reviews point the same way: 97% of Probability's written reviews are positive against 60% of Galton Board's.
Both ship on a similar rhythm, roughly every 3 months. Both last shipped on October 24, 2026.
| Parameter | Probability | Galton Board |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.9 (193 ratings) — better | 4.6 (44 ratings) |
| Positive reviews | 97.2% of reviews — better | 60.0% of reviews |
| Number of ratings | 193 — better | 44 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #196 — better | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 8 MB |
| Age rating | 17+ | 4+ |
| Developer | Matthew Bognar | Edwin Veger |
Customer experience
Probability
Galton Board
Bugs and requests
Probability
Requested features
7 requests- Exam mode similar to Geogebra
- Poisson distribution
- Allow setting plot boundaries (e.g., for Beta distribution)
- Make formulae available in offline mode
- Clearly introduce parameters
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- Add options after graph rendering (area above, between, outside values)
- Consistent terms for df across distributions
Galton Board
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Probability
No in-app purchases
Galton Board
No in-app purchases
Questions
Is Probability free?
Is Galton Board free?
Which has better reviews, Probability or Galton Board?
Do Probability or Galton Board have ads?
Which is updated more often, Probability or Galton Board?
Other comparisons
