Screen Ruler: Measure Length

Screen Ruler: Measure Length

CM, MM & Inch Measuring Tool

26 ratings
32 reviews
Free
In-App PurchasesWith Ads

Details

Released
November 11, 2016
Updated
November 3, 2026

Features

Screen Ruler: Measure Length video #1 for iPhone
Screen Ruler: Measure Length screenshot #2 for iPhone
iphone
ipad
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About

Transform your iPhone or iPad into a digital ruler. Measure small objects directly on your screen using centimeters or inches, with magnifier assistance and haptic feedback for precise alignment. Calibrate the ruler for accurate results.

✓Calibratable digital ruler
✓Centimeter and inch scales
✓Magnifier for precise alignment
✓Haptic feedback
✓Measure small objects on screen
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+1

What's New in Screen Ruler

1.9.7

November 3, 2026

What's new: • Added a “Start at Zero” option in Settings to keep the zero mark clear of rounded screen corners. • Added support for both iPhone Duo displays and iPad mini (A20 Pro).

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Subscriptions & In-App Purchases

$2.99

Support for a cup of coffee

☕️Support for a cup of coffee☕️

User reviews

Ad-ridden

Install only if you are ready to abuse yourself for a few pennies. Just awful.

ios26系统 ipad

横屏不能用 竖屏可以 希望改进

2% error on iPad

100mm measures as 102mm, so not appropriate

Eu só queria…

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

Incredibly Accurate and Easy to Use!

🌟🌟🌟🌟🌟

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!
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Developer apps

FAQ

What is Screen Ruler?

Screen Ruler is a utility app that turns your iPhone or iPad into a calibratable digital ruler. It allows you to measure small objects directly on your device's screen using centimeters and inches.

How accurate is Screen Ruler?

Accuracy depends on device calibration, screen placement, and precise alignment of measurement marks. It is designed for short, everyday measurements and does not use the camera or AR.

Can Screen Ruler measure large objects or rooms?

No, Screen Ruler is not intended for measuring rooms or large objects. It is specifically designed for small items that fit along your device screen.

Does Screen Ruler have ads?

Yes, Screen Ruler contains advertisements. Users may encounter ads while using the application.

What devices does Screen Ruler support?

Screen Ruler is supported on iPhone, iPad, and iPod devices.

How do I get the most reliable results with Screen Ruler?

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

What units of measurement does Screen Ruler use?

Screen Ruler supports both centimeters (CM) and inches for everyday measurements, allowing you to switch between scales as needed.

What is the age rating for Screen Ruler?

Screen Ruler has an age rating of 4+, making it suitable for a wide range of users.