# Stat Exam Pro vs Equation Encyclopedia

The clearest difference is in-app purchases: Stat Exam Pro at none against Equation Encyclopedia's 9. Stat Exam Pro also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Equation Encyclopedia's advantage is update cadence (every 4 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. Equation Encyclopedia sells 9 in-app purchases, starting at $6.99 per month. Stat Exam Pro asks for nothing beyond the download.

Stat Exam Pro ships an update every 2 weeks, Equation Encyclopedia every 4 days. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Stat Exam Pro | Equation Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 23 MB | 451 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [NIKA AROUTIOUNIAN](https://appshunter.io/developer/1857248548) | [SAMUEL MOYOSORE O ADEYIGA](https://appshunter.io/developer/1874179107) |

## What reviewers say

### Stat Exam Pro

[App page](https://appshunter.io/ios/app/stat-exam-pro/id6755912771)

**Features:** macOS Compatibility

**In-app purchases:** none


### Equation Encyclopedia

[App page](https://appshunter.io/ios/app/equation-encyclopedia/id6758647681)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $6.99 | per month |
| Pro Monthly | $10.99 | per month |
| Ultra Monthly | $17.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultra Yearly | $149.99 | per year |
| 10 Energy | $0.99 | one-time |
| 30 Energy | $2.99 | one-time |
| 100 Energy | $8.99 | one-time |


## Frequently asked questions

### Is Stat Exam Pro free?

Stat Exam Pro is free to download, with no in-app purchases.

### Is Equation Encyclopedia free?

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

### Do Stat Exam Pro or Equation Encyclopedia have ads?

Equation Encyclopedia shows ads; Stat Exam Pro does not.

### Which is updated more often, Stat Exam Pro or Equation Encyclopedia?

Stat Exam Pro ships an update every 2 weeks, and Equation Encyclopedia every 4 days. Most recently, Stat Exam Pro was updated on October 12, 2026 and Equation Encyclopedia on October 10, 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.*