# Probability Toolkit vs Brickmason

The clearest difference is price: Brickmason at Free against Probability Toolkit's $1.99. Brickmason also leads on device support (3 vs 1). Probability Toolkit's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence there is nothing between them.

Brickmason is free to download; Probability Toolkit costs $1.99 up front. Brickmason sells 1 one-off in-app purchase. Probability Toolkit asks for nothing beyond the download.

Probability Toolkit ships an update every 10 months, Brickmason every 6 months. The most recent releases landed on May 17, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Probability Toolkit | Brickmason |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 6 months** |
| Size | 41 MB | 17 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [振华 许](https://appshunter.io/developer/1437340417) |

## What reviewers say

### Probability Toolkit

[App page](https://appshunter.io/ios/app/probability-toolkit/id652216774)

**Features:** macOS Compatibility

**In-app purchases:** none


### Brickmason

[App page](https://appshunter.io/ios/app/brickmason/id1437340418)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |


## Frequently asked questions

### Is Probability Toolkit free?

Probability Toolkit costs $1.99, with no in-app purchases.

### Is Brickmason free?

Brickmason is free to download, with in-app purchases available.

### Do Probability Toolkit or Brickmason have ads?

Brickmason shows ads; Probability Toolkit does not.

### Which is updated more often, Probability Toolkit or Brickmason?

Probability Toolkit ships an update every 10 months, and Brickmason every 6 months. Most recently, Probability Toolkit was updated on May 17, 2026 and Brickmason on September 18, 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.*