# Combinations & Probabilities vs Scientific math Calculator

The clearest difference is price: Combinations & Probabilities at Free against Scientific math Calculator's $0.99. Combinations & Probabilities also leads on update cadence (weekly vs every 3 months). Scientific math Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

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

Combinations & Probabilities ships an update weekly, Scientific math Calculator every 3 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Combinations & Probabilities | Scientific math Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 months |
| Size | 33 MB | 5 MB |
| Requires iOS | 26.0 | **18.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | +4 | 9+ |
| Developer | [Joao Carrion](https://appshunter.io/developer/1044104256) | [贺 周](https://appshunter.io/developer/1815397078) |

## What reviewers say

### 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 |


### Scientific math Calculator

[App page](https://appshunter.io/ios/app/scientific-math-calculator/id6759213986)

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

**In-app purchases:** none


## Frequently asked questions

### Is Combinations & Probabilities free?

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

### Is Scientific math Calculator free?

Scientific math Calculator costs $0.99, with no in-app purchases.

### Do Combinations & Probabilities or Scientific math Calculator have ads?

Combinations & Probabilities shows ads; Scientific math Calculator does not.

### Which is updated more often, Combinations & Probabilities or Scientific math Calculator?

Combinations & Probabilities ships an update weekly, and Scientific math Calculator every 3 months. Most recently, Combinations & Probabilities was updated on October 28, 2026 and Scientific math Calculator on October 25, 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.*