# Stat Exam Pro vs Calculus Formulas

The clearest difference is in-app purchases: Stat Exam Pro at none against Calculus Formulas's 3. Stat Exam Pro also leads on iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Calculus Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Stat Exam Pro asks for nothing beyond the download.

## The numbers

| Metric | Stat Exam Pro | Calculus Formulas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 23 MB | 48 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [NIKA AROUTIOUNIAN](https://appshunter.io/developer/1857248548) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### Stat Exam Pro

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculus Formulas

[App page](https://appshunter.io/ios/app/calculus-formulas-calcref/id6761394165)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| CalcRef Yearly Premium | $44.99 | per year |
| CalcRef Premium Lifetime | $74.99 | one-time |


## Frequently asked questions

### Is Stat Exam Pro free?

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

### Is Calculus Formulas free?

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

### Do Stat Exam Pro or Calculus Formulas have ads?

Neither Stat Exam Pro nor Calculus Formulas shows ads.

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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.*