# Binary Brain vs Combinations & Probabilities

The clearest difference is price: Combinations & Probabilities at Free against Binary Brain's $0.99. Combinations & Probabilities also leads on update cadence (weekly vs every 38 months). Binary Brain's advantage is in-app purchases (none vs 1) and ads (none vs shown).

Combinations & Probabilities is free to download; Binary Brain costs $0.99 up front. Combinations & Probabilities sells 1 one-off in-app purchase. Binary Brain asks for nothing beyond the download.

Binary Brain ships an update every 38 months, Combinations & Probabilities weekly. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Binary Brain | Combinations & Probabilities |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Weekly** |
| Size | 6 MB | 33 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | +4 |
| Developer | [George Chalkiadoudis](https://appshunter.io/developer/1040522966) | [Joao Carrion](https://appshunter.io/developer/1044104256) |

## What reviewers say

### Binary Brain

[App page](https://appshunter.io/ios/app/binary-brain/id1040522967)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Combinations & Probabilities

[App page](https://appshunter.io/ios/app/combinations-and-probabilities/id6758729922)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| C&P Pro | $2.99 | one-time |


## Frequently asked questions

### Is Binary Brain free?

Binary Brain costs $0.99, with no in-app purchases.

### Is Combinations & Probabilities free?

Combinations & Probabilities is free to download, with in-app purchases available.

### Do Binary Brain or Combinations & Probabilities have ads?

Combinations & Probabilities shows ads; Binary Brain does not.

### Which is updated more often, Binary Brain or Combinations & Probabilities?

Binary Brain ships an update every 38 months, and Combinations & Probabilities weekly. Most recently, Binary Brain was updated on September 21, 2026 and Combinations & Probabilities on September 23, 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.*