# ARC Geometry vs Project Chiron

The clearest difference is update cadence: Project Chiron at every 8 days against ARC Geometry's every 2 months. ARC Geometry's advantage is iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ARC Geometry ships an update every 2 months, Project Chiron every 8 days. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ARC Geometry | Project Chiron |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Size | 148 MB | 171 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CleverBooks Limited](https://appshunter.io/developer/1308199195) | [James Booth](https://appshunter.io/developer/1745107348) |

## What reviewers say

### ARC Geometry

[App page](https://appshunter.io/ios/app/arc-geometry/id1564453303)

**In-app purchases:** none


### Project Chiron

[App page](https://appshunter.io/ios/app/project-chiron/id6502346822)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ARC Geometry free?

ARC Geometry is free to download, with no in-app purchases.

### Is Project Chiron free?

Project Chiron is free to download, with no in-app purchases.

### Do ARC Geometry or Project Chiron have ads?

Neither ARC Geometry nor Project Chiron shows ads.

### Which is updated more often, ARC Geometry or Project Chiron?

ARC Geometry ships an update every 2 months, and Project Chiron every 8 days. Most recently, ARC Geometry was updated on October 11, 2026 and Project Chiron on October 24, 2026.

---

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