# Calculus vs SigmaQuest

The clearest difference is price: SigmaQuest at Free against Calculus's $1.99. Calculus's advantage is in-app purchases (none vs 10) and ads (none vs shown). On device support there is nothing between them.

SigmaQuest is free to download; Calculus costs $1.99 up front. SigmaQuest sells 10 one-off in-app purchases. Calculus asks for nothing beyond the download.

## The numbers

| Metric | Calculus | SigmaQuest |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Size | 64 MB | 7 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alessandro Cozzarini](https://appshunter.io/developer/433618036) | [NICOLAS JORGE PETRIDES](https://appshunter.io/developer/6798856218) |

## What reviewers say

### Calculus

[App page](https://appshunter.io/ios/app/calculus-limits/id6740908367)

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

**In-app purchases:** none


### SigmaQuest

[App page](https://appshunter.io/ios/app/sigmaquest-learn-statistics/id6805579459)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gauss | $1.99 | one-time |
| Professor Sigma | $1.99 | one-time |
| Nutty | $1.99 | one-time |
| Bayes | $1.99 | one-time |
| Asymp | $1.99 | one-time |
| Vegas | $1.99 | one-time |
| Outlier | $1.99 | one-time |
| Alpha | $1.99 | one-time |
| The Central Limit | $1.99 | one-time |
| Unlock All Buddies | $9.99 | one-time |


## Frequently asked questions

### Is Calculus free?

Calculus costs $1.99, with no in-app purchases.

### Is SigmaQuest free?

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

### Do Calculus or SigmaQuest have ads?

SigmaQuest shows ads; Calculus does not.

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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.*