# Probability(Math Drills) vs Galton Board App

The clearest difference is in-app purchases: Probability(Math Drills) at none against Galton Board App's 1. Probability(Math Drills) also leads on iOS requirement (12.0 vs 15.0). Galton Board App's advantage is device support (4 vs 2). On price, update cadence and ads there is nothing between them.

Both are free to download. Galton Board App sells 1 one-off in-app purchase. Probability(Math Drills) asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 4, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Probability(Math Drills) | Galton Board App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (116 ratings)](https://appshunter.io/ios/app/galton-board-app/id6446604966/reviews)** |
| Number of ratings | — | **116** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 67 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [郷 田村](https://appshunter.io/developer/1574588679) | [Index Fund Advisors, Inc](https://appshunter.io/developer/914924558) |

## What reviewers say

### Probability(Math Drills)

[App page](https://appshunter.io/ios/app/probabilitymath-drills/id1632889899)

**Features:** macOS Compatibility

**In-app purchases:** none


### Galton Board App

[App page](https://appshunter.io/ios/app/galton-board-app/id6446604966)

Explore probability and mathematical concepts through an interactive simulation. This app uses your device's gyroscope to create a dynamic Galton Board, illustrating binomial and normal distributions. It also offers a stock market simulation to demonstrate market return probabilities.

**Highlights:** 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

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stock Market Data | Free | one-time |

**What reviewers like**

- 👍 Great for understanding bell curves
- 👍 Excellent educational tool
- 👍 Visually appealing and well-designed
- 👍 Helpful for STEM and psychology classes
- 👍 Simplifies complex math concepts

**Requested features**

- Bring back the physical product (commented by EJ's App, likely not a feature request for the app itself but a general wish)


## Frequently asked questions

### Is Probability(Math Drills) free?

Probability(Math Drills) is free to download, with no in-app purchases.

### Is Galton Board App free?

Galton Board App is free to download, with in-app purchases available.

### Do Probability(Math Drills) or Galton Board App have ads?

Neither Probability(Math Drills) nor Galton Board App shows ads.

### Which is updated more often, Probability(Math Drills) or Galton Board App?

Probability(Math Drills) ships an update every 3 weeks, and Galton Board App every 3 weeks. Most recently, Probability(Math Drills) was updated on August 4, 2026 and Galton Board App on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*