# Architects Ruler vs ARCmaster

The clearest difference is in-app purchases: ARCmaster at none against Architects Ruler's 1. ARCmaster also leads on update cadence (every 3 weeks vs every 3 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Architects Ruler sells 1 one-off in-app purchase. ARCmaster asks for nothing beyond the download.

Architects Ruler ships an update every 3 months, ARCmaster every 3 weeks. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Architects Ruler | ARCmaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 4 MB | 30 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gijs Raggers](https://appshunter.io/developer/1438841415) | [Anh Thu Duong](https://appshunter.io/developer/1887275689) |

## What reviewers say

### Architects Ruler

[App page](https://appshunter.io/ios/app/architects-ruler/id6755367822)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime scales menu | $0.99 | one-time |


### ARCmaster

[App page](https://appshunter.io/ios/app/arcmaster-geometry-calculator/id6761011090)

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

**In-app purchases:** none


## Frequently asked questions

### Is Architects Ruler free?

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

### Is ARCmaster free?

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

### Do Architects Ruler or ARCmaster have ads?

Neither Architects Ruler nor ARCmaster shows ads.

### Which is updated more often, Architects Ruler or ARCmaster?

Architects Ruler ships an update every 3 months, and ARCmaster every 3 weeks. Most recently, Architects Ruler was updated on October 17, 2026 and ARCmaster on October 10, 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.*