# Ruler with Caliper, Protractor vs Infinite Ruler

The clearest difference is review sentiment: Infinite Ruler at 100% against Ruler with Caliper, Protractor's 0%. Infinite Ruler also leads on in-app purchases (none vs 3) and ads (none vs shown). Ruler with Caliper, Protractor's advantage is iOS requirement (16.0 vs 18.2). 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. Infinite Ruler asks for nothing beyond the download.

Ruler with Caliper, Protractor ships an update every 28 months, Infinite Ruler every 7 months. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Ruler with Caliper, Protractor | Infinite Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/infinite-ruler/id6746876762/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 28 months | **Every 7 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 6 MB |
| Requires iOS | **16.0** | 18.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Eric Savoie](https://appshunter.io/developer/1695096773) |

## 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 |


### Infinite Ruler

[App page](https://appshunter.io/ios/app/infinite-ruler/id6746876762)

Measure objects with precision using a digital ruler that extends beyond your screen. Choose fractional inch or centimeter units and calibrate for accuracy. Ideal for quick measurements when a physical tool isn't available.

**Highlights:** Fractional inch or centimeter measurement, Adjustable precision (1/8, 1/16, 1/32 inch), Extendable ruler beyond screen length, Customizable zero point, Live distance markers, On-device calibration

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

**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 Infinite Ruler free?

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

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

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

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

Ruler with Caliper, Protractor ships an update every 28 months, and Infinite Ruler every 7 months. Most recently, Ruler with Caliper, Protractor was updated on October 22, 2026 and Infinite Ruler on October 8, 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.*