# SigmaQuest vs Introductory Statistics Tutor

The clearest difference is ads: Introductory Statistics Tutor at none against SigmaQuest's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. SigmaQuest sells 10 one-off in-app purchases and Introductory Statistics Tutor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | SigmaQuest | Introductory Statistics Tutor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 3 weeks |
| Size | 7 MB | 22 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NICOLAS JORGE PETRIDES](https://appshunter.io/developer/6798856218) | [David Soulsby](https://appshunter.io/developer/1776367161) |

## What reviewers say

### 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 |


### Introductory Statistics Tutor

[App page](https://appshunter.io/ios/app/introductory-statistics-tutor/id6815790980)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Topics | $4.99 | one-time |


## Frequently asked questions

### Is SigmaQuest free?

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

### Is Introductory Statistics Tutor free?

Introductory Statistics Tutor is free to download, with in-app purchases available.

### Do SigmaQuest or Introductory Statistics Tutor have ads?

SigmaQuest shows ads; Introductory Statistics Tutor does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*