# Galton Board vs SpeedJack 21

The clearest difference is ads: Galton Board at none against SpeedJack 21's shown. Galton Board also leads on ratings volume (44 vs 1) and monetization model (free vs ad-supported). SpeedJack 21's advantage is update cadence (fortnightly vs every 3 months) and rating (5.0 vs 4.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SpeedJack 21 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Galton Board has 44 ratings behind it against 1, so its average is the more settled of the two.

Galton Board ships an update every 3 months, SpeedJack 21 fortnightly. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Galton Board | SpeedJack 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (44 ratings)](https://appshunter.io/ios/app/galton-board/id1419746563/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/speedjack-21/id1511287771/reviews)** |
| Number of ratings | **44** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 8 MB | 86 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Edwin Veger](https://appshunter.io/developer/1025412576) | [KwangRim Ahn](https://appshunter.io/developer/1511287770) |

## What reviewers say

### Galton Board

[App page](https://appshunter.io/ios/app/galton-board/id1419746563)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### SpeedJack 21

[App page](https://appshunter.io/ios/app/speedjack-21/id1511287771)

Practice your blackjack basic strategy with this educational app. Achieve consecutive correct answers to rank your time record on the server and improve your casino winning average.

**Highlights:** Blackjack basic strategy practice, Consecutive correct answer challenge, Server-based time ranking, Improve casino winning average, User sign-in required for challenges

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Galton Board free?

Galton Board is free to download, with no in-app purchases.

### Is SpeedJack 21 free?

SpeedJack 21 is free to download, with no in-app purchases.

### Which has better reviews, Galton Board or SpeedJack 21?

SpeedJack 21 is rated higher. Galton Board averages 4.6 out of 5 from 44 ratings, while SpeedJack 21 averages 5.0 from 1 ratings.

### Do Galton Board or SpeedJack 21 have ads?

SpeedJack 21 shows ads; Galton Board does not.

### Which is updated more often, Galton Board or SpeedJack 21?

Galton Board ships an update every 3 months, and SpeedJack 21 fortnightly. Most recently, Galton Board was updated on October 24, 2026 and SpeedJack 21 on October 20, 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.*