# Ruler - CM, MM, Inches

> CM, MM, In. Measure Anything.

Canonical page: [https://chrome-stats.com/d/id1022857549](https://chrome-stats.com/d/id1022857549)

## Overview

- **ID:** `id1022857549`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Noadit, Inc.
- **Category:** Utilities
- **Rating:** 3.50 / 5 (79 ratings)
- **Version:** 26.3
- **Last updated:** 2026-09-17
- **First published:** 2015-08-12
- **Size:** 8.75 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/ruler-cm-mm-inches/id1022857549)
- **Website:** [https://www.noadit.com](https://www.noadit.com/)
- **Privacy policy:** [https://www.noadit.com/privacy/v2/](https://www.noadit.com/privacy/v2/)

## Description

**Ruler - CM, MM, Inches** turns your iPhone into a convenient digital measuring tool for everyday use. Measure lengths, widths, and diagonals horizontally, vertically, or diagonally without carrying bulky equipment.

Switch between centimeters, millimeters, inches, and fractions, or view dual units for quick comparisons. The app supports measurements from screen or device edges and includes a 2.54-meter ultra-long scroll ruler for larger objects. Auto-calibration adapts to your device model for up to 1% accuracy, while screen lock helps prevent accidental changes during measurement.

## Rankings

- #163,946 — Overall
- #19 — rule

## Review summary

Users describe Ruler as a simple, flexible tool for quick measurements, with support for cm and inches (or both) and handy extras like a protractor and level. However, multiple reviews cite intrusive ads, inconsistent measurements and missing fractional-inch options, plus UI annoyances such as the finger obstructing measurements and misalignment when both units are enabled. Some praise the sturdy interface and developer responsiveness, while others report accuracy issues (e.g., 1/4 vs 1/8, decimal inches) and ad/updates problems. Overall, it's useful for quick visual sizes but unreliable for precise inch work and ad-free usage.

### Pros

- Simple, no-frills ruler that's easy to use.
- Flexible unit options: cm only, inches only, or both.
- Useful for visualizing sizes on screen and for small objects/scale modeling.
- Responsive developers who listen to feedback and fix issues quickly.
- Includes extra tools (protractor, level) for added utility.

### Cons

- Ads are intrusive and can overwhelm the interface; some users report ads reappearing even after paying.
- Accuracy issues and inconsistent inch subdivisions (problems with 1/2, 1/4, 1/8, 1/16, or decimal inches).
- UI/interaction problems, such as the finger obscuring the measurement and misalignment when both units are displayed.
- Lack of or inadequate support for common fractional inches led to frustration among inch users.
- Some reports of bugs or odd behavior (e.g., black screen) and ad-related complaints.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1022857549)