# Stats & Probability Calculator vs Or Simplex Step

The clearest difference is ads: Stats & Probability Calculator at none against Or Simplex Step's shown. Or Simplex Step's advantage is update cadence (every 10 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Stats & Probability Calculator sells 3 in-app purchases, starting at $0.99 per month and Or Simplex Step sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Stats & Probability Calculator ships an update every 4 months, Or Simplex Step every 10 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Stats & Probability Calculator | Or Simplex Step |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 10 days** |
| Size | 27 MB | 45 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) | [Bohdan Bezpartochnyi](https://appshunter.io/developer/1850325090) |

## What reviewers say

### Stats & Probability Calculator

[App page](https://appshunter.io/ios/app/stats-and-probability-calculator/id6748586083)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version / monthly | $0.99 | per month |
| Full version / year | $2.99 | per year |
| Remove ADS | $3.99 | one-time |


### Or Simplex Step

[App page](https://appshunter.io/ios/app/or-simplex-step-by-step-solver/id6816232479)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OR Commented Pro | $2.99 | one-time |


## Frequently asked questions

### Is Stats & Probability Calculator free?

Stats & Probability Calculator is free to download, with in-app purchases available.

### Is Or Simplex Step free?

Or Simplex Step is free to download, with in-app purchases available.

### Do Stats & Probability Calculator or Or Simplex Step have ads?

Or Simplex Step shows ads; Stats & Probability Calculator does not.

### Which is updated more often, Stats & Probability Calculator or Or Simplex Step?

Stats & Probability Calculator ships an update every 4 months, and Or Simplex Step every 10 days. Most recently, Stats & Probability Calculator was updated on October 28, 2026 and Or Simplex Step on October 24, 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.*