# Pythagorean theorem App vs GeoFormulas by ChatStick

The clearest difference is in-app purchases: Pythagorean theorem App at none against GeoFormulas by ChatStick's 1. Pythagorean theorem App also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. GeoFormulas by ChatStick sells 1 one-off in-app purchase. Pythagorean theorem App asks for nothing beyond the download.

Pythagorean theorem App ships an update every 9 months, GeoFormulas by ChatStick every 7 months. The most recent releases landed on October 27, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Pythagorean theorem App | GeoFormulas by ChatStick |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 7 months** |
| Size | 23 MB | 8 MB |
| Requires iOS | **15.6** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Edwin Mejia](https://appshunter.io/developer/1620400021) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### Pythagorean theorem App

[App page](https://appshunter.io/ios/app/pythagorean-theorem-app/id1621751722)

**Features:** macOS Compatibility

**In-app purchases:** none


### GeoFormulas by ChatStick

[App page](https://appshunter.io/ios/app/geoformulas-by-chatstick/id6751835608)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Feature | $2.99 | one-time |


## Frequently asked questions

### Is Pythagorean theorem App free?

Pythagorean theorem App is free to download, with no in-app purchases.

### Is GeoFormulas by ChatStick free?

GeoFormulas by ChatStick is free to download, with in-app purchases available.

### Do Pythagorean theorem App or GeoFormulas by ChatStick have ads?

GeoFormulas by ChatStick shows ads; Pythagorean theorem App does not.

### Which is updated more often, Pythagorean theorem App or GeoFormulas by ChatStick?

Pythagorean theorem App ships an update every 9 months, and GeoFormulas by ChatStick every 7 months. Most recently, Pythagorean theorem App was updated on October 27, 2026 and GeoFormulas by ChatStick on October 18, 2026.

---

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