# Screen Ruler: Measure Length — CM, MM & Inch Measuring Tool

> Digital ruler app for precise length measurements on iPhone and iPad. (iPhone/iPad app by 向阳 杨.)

- Source: https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735 (this page in markdown: same URL + `.md`)
- Developer: [向阳 杨](https://appshunter.io/developer/1174757734)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 3.60/5 from 23 App Store ratings · 31 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: British English, Arabic, French (France), German (Germany), Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China), European Spanish
- Released: 2016-11-11
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735/reviews.md

## What is Screen Ruler?

Turn your iPhone or iPad into a calibratable digital ruler for measuring small objects directly on the screen. Screen Ruler supports centimeters and inches, magnifier-assisted alignment, and haptic feedback.

Measure Small Objects on Your Screen

Use Screen Ruler for stationery, frames, craft materials, and other small objects that fit along your device screen. Place the object directly on the screen, move the measurement marks to its edges, and read the length.

Core Features

• Calibratable ruler: Match the scale to an object of known length and save calibration for your device.
• CM and inch scales: Switch between centimeters and inches for everyday measurements.
• Magnifier assist: Align measurement marks with object edges more confidently.
• Haptic feedback: Feel subtle feedback while adjusting the marks.

How to Get More Reliable Results

For best results, place the object directly on the screen and check the scale against a known length. Calibrate the ruler if you notice an offset.

Accuracy and Limitations

Screen Ruler is designed for short, everyday measurements. Accuracy depends on device calibration, screen placement, and how precisely the marks are aligned. It does not use the camera or AR and is not intended for measuring rooms or large objects.

Feedback: ankek1er@gmail.com

## Key features

- Dual units (cm/inches)
- Precision calibration
- Magnifier mode
- Haptic feedback
- Clean interface
- Save and label measurements

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Support for a cup of coffee | $2.99 | one-time |
| Ads-free experience | $1.99 | one-time |


## Recent user reviews (10 of 31)

All indexed reviews: https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735/reviews.md

### 5/5 — ios26系统 ipad

*2025-10-26, version 1.9.0*

横屏不能用 竖屏可以 希望改进

### 2/5 — 2% error on iPad

*2025-08-31, version 1.8.4*

100mm measures as 102mm, so not appropriate

### 1/5 — Eu só queria…

*2025-06-07, version 1.8.3*

Que não tivesse dois pontos de medição. Só um. Mas não sei como fazer isso.

### 5/5 — Incredibly Accurate and Easy to Use!

*2025-05-21*

🌟🌟🌟🌟🌟

I've tried several screen ruler apps before, but this one stands out for its precision and smooth user experience. The interface is clean and intuitive, making it perfect for quick measurements on the go. I especially appreciate how easy it is to switch units and calibrate the ruler to my screen. Whether I'm measuring small objects for design work or just checking dimensions out of curiosity, this app gets the job done perfectly. Highly recommended for anyone who needs a reliable digital ruler!

### 1/5 — Ads and tracking

*2025-02-13*

Totally unnecessary but also unsurprising.

### 1/5 — Not accurate

*2024-12-09*

I held a clear ruler up to the screen and both inches and mm were smaller than the ruler.

### 1/5 — 広告が閉じられない

*2024-11-29, version 1.8.1*

アンインストール

### 5/5 — excelente mesmo muito bom

*2024-10-22, version 1.7.2*

excelente mesmo muito bom

### 5/5 — long

*2024-09-22*

i got exactly 4 inches lets go

### 5/5 — Simple

*2024-08-10*

Simple, easy to use, great app!

## Frequently asked questions about Screen Ruler

### What does the Screen Ruler app do?

This app transforms your iPhone or iPad into a precise measuring tool. It allows you to measure various lengths with confidence, whether you are at home, in the office, or outdoors. The app utilizes high-precision algorithms to ensure accurate and reliable measurement results.

### What are the key features of Screen Ruler?

Key features include dual units for switching between centimeters and inches, precision calibration for accurate results, a magnifier mode for fine measurements, and haptic feedback for an enhanced user experience. It also boasts a clean interface with clear scale markings and the ability to save and label measurements.

### Is Screen Ruler free to use?

The app is free to download and use, but it does offer in-app purchases and may display advertisements. These in-app purchases likely provide access to additional features or remove ads, enhancing the overall user experience.

### What devices is Screen Ruler compatible with?

The app is universally compatible and perfectly adapted for all iPhone and iPad models, including the latest devices. Its technical excellence ensures it runs smoothly and utilizes the device's capabilities for precise measurements.

### Who would find Screen Ruler useful?

This app is perfect for daily life tasks such as measuring small objects or furniture, for office and study use like quick document measurements, for DIY projects in home improvement and crafts, and for anyone needing a convenient mobile measuring tool on the go.

## Version history (last 5 releases)

### 1.9.5 — 2026-08-18

What's New:
• Improved the privacy choices experience for smoother first-time use and app reopening.
• Improved startup to reduce occasional delays and display issues.
• Added an official website link in Settings, so help and product information are easier to find.
• Fixed known issues and improved overall stability.

### 1.9.4 — 2026-05-29

Version 1.9.4 refreshes App Store metadata, updates official website links to getruler.app, and includes stability improvements.

### 1.9.3 — 2026-02-09

Bug fixes and stability improvements

### 1.9.2 — 2026-01-28

Version 1.9.2 Update:
• Bug fixes and stability improvements
• Performance optimizations for smoother experience
• Enhanced app reliability

### 1.9.1 — 2025-11-04

Version 1.9.1 Update:

• **Fixed iPhone 17 Series Support Issue**
• Corrected device identification errors for iPhone 17 series
• Ensures accurate measurement precision and calibration for all iPhone 17 devices
• Full support for iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone 17 Air

Thank you for your patience! You can now enjoy precise measurements on your iPhone 17 series.

## Apps similar to Screen Ruler

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Measuring Tape+ Measure AR app](https://appshunter.io/ios/app/measuring-tape-plus-measure-ar-app/id6444381350) | 4.5 (2,022) | Free | Utilities |
| [Measuring Tape +ㅤ](https://appshunter.io/ios/app/measuring-tape-plus/id1620141081) | 4.8 (5,123) | Free | Utilities |
| [Tape Measure+ AR Digital Ruler](https://appshunter.io/ios/app/tape-measure-plus-ar-digital-ruler/id1667165565) | 4.4 (931) | Free | Utilities |
| [Tape Measure & Ruler Арр](https://appshunter.io/ios/app/tape-measure-and-ruler/id1453537222) | 4.2 (4,291) | Free | Utilities |
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| [Ruler, Measuring Tape - AR App](https://appshunter.io/ios/app/ruler-measuring-tape-ar-app/id1462163605) | 4.3 (1,026) | Free | Utilities |

## More apps by 向阳 杨

- [Protractor Edge-angle measure](https://appshunter.io/ios/app/protractor-edge-angle-measure/id1499078532)
- [StoreShots: Create store shots](https://appshunter.io/ios/app/storeshots-create-store-shots/id6747141086)
- [AI Repeater](https://appshunter.io/ios/app/ai-repeater/id6755429701)

All apps by 向阳 杨: https://appshunter.io/developer/1174757734

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*