# Architects Ruler vs Scale Ruler

The clearest difference is update cadence: Scale Ruler at every 2 weeks against Architects Ruler's every 3 months. Scale Ruler also leads on device support (3 vs 1) and iOS requirement (17.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Architects Ruler sells 1 one-off in-app purchase and Scale Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Architects Ruler ships an update every 3 months, Scale Ruler every 2 weeks. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Architects Ruler | Scale Ruler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 4 MB | 11 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Gijs Raggers](https://appshunter.io/developer/1438841415) | [佳 赵](https://appshunter.io/developer/6802149278) |

## 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 |


### Scale Ruler

[App page](https://appshunter.io/ios/app/scale-ruler-pocket-ruler/id6802178983)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scale Ruler Pro | $1.99 | one-time |


## Frequently asked questions

### Is Architects Ruler free?

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

### Is Scale Ruler free?

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

### Do Architects Ruler or Scale Ruler have ads?

Neither Architects Ruler nor Scale Ruler shows ads.

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

Architects Ruler ships an update every 3 months, and Scale Ruler every 2 weeks. Most recently, Architects Ruler was updated on November 5, 2026 and Scale Ruler on November 6, 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.*