# Ruler with Caliper, Protractor vs Architects Ruler

The clearest difference is ads: Architects Ruler at none against Ruler with Caliper, Protractor's shown. Architects Ruler also leads on update cadence (every 3 months vs every 28 months). Ruler with Caliper, Protractor's advantage is iOS requirement (16.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Ruler with Caliper, Protractor sells 3 in-app purchases, starting at $3.99 per 7 days and Architects Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Ruler with Caliper, Protractor ships an update every 28 months, Architects Ruler every 3 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ruler with Caliper, Protractor | Architects Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 28 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 4 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Gijs Raggers](https://appshunter.io/developer/1438841415) |

## What reviewers say

### Ruler with Caliper, Protractor

[App page](https://appshunter.io/ios/app/ruler-with-caliper-protractor/id1368462815)

This app transforms your device into a precise digital measuring tool. It offers accurate measurements for various objects and distances using your camera, with multiple units and offline functionality.

**Highlights:** Accurate measurements via camera, Measure small objects to large distances, User-friendly interface, Multiple measurement units (inches, cm), Virtual ruler on screen, Save and share measurements, Offline accessibility

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Yearly | $39.99 | per year |
| Lifetime | $49.99 | one-time |


### 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 |


## Frequently asked questions

### Is Ruler with Caliper, Protractor free?

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

### Is Architects Ruler free?

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

### Do Ruler with Caliper, Protractor or Architects Ruler have ads?

Ruler with Caliper, Protractor shows ads; Architects Ruler does not.

### Which is updated more often, Ruler with Caliper, Protractor or Architects Ruler?

Ruler with Caliper, Protractor ships an update every 28 months, and Architects Ruler every 3 months. Most recently, Ruler with Caliper, Protractor was updated on October 22, 2026 and Architects Ruler on October 24, 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.*