# Geometry Quick Reference vs Art of Stat

The clearest difference is price: Art of Stat at Free against Geometry Quick Reference's $0.99. Art of Stat also leads on update cadence (every 3 weeks vs every 37 months) and device support (3 vs 1). Geometry Quick Reference's advantage is in-app purchases (none vs 7) and iOS requirement (12.0 vs 15.1). On ads there is nothing between them.

Art of Stat is free to download; Geometry Quick Reference costs $0.99 up front. Art of Stat sells 7 one-off in-app purchases. Geometry Quick Reference asks for nothing beyond the download.

Geometry Quick Reference ships an update every 37 months, Art of Stat every 3 weeks. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Geometry Quick Reference | Art of Stat |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (12 ratings)](https://appshunter.io/ios/app/art-of-stat-concepts/id6444956478/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 7 MB | 29 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Bernhard Klingenberg](https://appshunter.io/developer/1564877195) |

## What reviewers say

### Geometry Quick Reference

[App page](https://appshunter.io/ios/app/geometry-quick-reference/id706066085)

**Features:** macOS Compatibility

**In-app purchases:** none


### Art of Stat

[App page](https://appshunter.io/ios/app/art-of-stat-concepts/id6444956478)

This app helps students and teachers visualize and understand core statistical concepts like the Central Limit Theorem, correlation, and hypothesis testing. Interactive modules allow for step-by-step exploration of sampling distributions, regression, and error probabilities.

**Highlights:** Central Limit Theorem simulation, Correlation and linear regression exploration, Confidence interval coverage visualization, Type I & II error analysis, Interactive scatterplot builder, Step-by-step concept learning

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Central Limit Theorem (Means) | $0.99 | one-time |
| Central Limit Theorem (Props) | $0.99 | one-time |
| Coverage Confidence Intervals | $0.99 | one-time |
| Explore Type I Error & Power | $0.99 | one-time |
| Explore Correlation | $0.99 | one-time |
| Explore Linear Regression | $0.99 | one-time |
| Unlock all Modules | $2.99 | one-time |


## Frequently asked questions

### Is Geometry Quick Reference free?

Geometry Quick Reference costs $0.99, with no in-app purchases.

### Is Art of Stat free?

Art of Stat is free to download, with in-app purchases available.

### Do Geometry Quick Reference or Art of Stat have ads?

Neither Geometry Quick Reference nor Art of Stat shows ads.

### Which is updated more often, Geometry Quick Reference or Art of Stat?

Geometry Quick Reference ships an update every 37 months, and Art of Stat every 3 weeks. Most recently, Geometry Quick Reference was updated on October 10, 2026 and Art of Stat on October 8, 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.*