# Ruler with Caliper, Protractor vs Rules Measure

The clearest difference is in-app purchases: Rules Measure at none against Ruler with Caliper, Protractor's 3. Rules Measure also leads on ads (none vs shown) and update cadence (every 9 days vs every 28 months). Ruler with Caliper, Protractor's advantage is iOS requirement (16.0 vs 26.0). On price 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. Rules Measure asks for nothing beyond the download.

Ruler with Caliper, Protractor ships an update every 28 months, Rules Measure every 9 days. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Ruler with Caliper, Protractor | Rules Measure |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 28 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 12 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Davis McDowell](https://appshunter.io/developer/1888685588) |

## 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 |


### Rules Measure

[App page](https://appshunter.io/ios/app/rules-measure/id6761289085)

**In-app purchases:** none


## Frequently asked questions

### Is Ruler with Caliper, Protractor free?

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

### Is Rules Measure free?

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

### Do Ruler with Caliper, Protractor or Rules Measure have ads?

Ruler with Caliper, Protractor shows ads; Rules Measure does not.

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

Ruler with Caliper, Protractor ships an update every 28 months, and Rules Measure every 9 days. Most recently, Ruler with Caliper, Protractor was updated on October 5, 2026 and Rules Measure on October 16, 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.*