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Ruler®

Ruler®

+ Photo Ruler & AR Measure

35K ratings
565 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 28, 2013
  • January 2, 2026

Features

Developer

Tue Nguyen Minh
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ipad
🧾$1.99
In-App Purchase↘︎
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About

This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.

✓Classic ruler and tape measure
✓Camera ruler mode
✓Photo measures mode
✓Dual unit support (inches/cm)
✓Precision sliders for small objects
✓Elegant and user-friendly interface
Show original description

What users say

Summarized from real user reviews of Ruler®. Based on 35K reviews and a 4.3/5 average, it highlights the 4 positives and 4 negatives reviewers mention most about this Utilities app.

Positive things

  • 🚀Accurate measurements
  • 👍Easy to use
  • 🔍Convenient for small items
  • 📏Useful ruler tool

Negative things

  • 💰Paywall for basic features
  • ⏱️Limited free usage time
  • 🔍Inaccurate for larger objects
  • 🙅‍♀️Aggressive monetization tactics
See all reviews

What's New in Ruler®

3.8.5

January 2, 2026

Minor bug fixes

Subscription plans

Ruler Pro (Weekly)

Unlock all premium features and remove ads.

$1.997 Days
3 Days trial
How to cancel Ruler® subscription ⁉️
2

In-App Purchases

$1.99

Pro Features

AR Ruler, Photo Ruler and more.

User reviews

Most RecentHighest RatedLowest Rated

was good

had it all this time then they removed the metric side unless you pay for it so now deleted
PaddyhopPaddyhop

was in cm asked for money for it to be changed into inches

Like my title said they had it in cm and I couldn't change it to inches without paying. I even tried to see how many cm are in inches but it was really hard to tell. It's free and no ads but still🙄
yyeweyyewe

Costs money for inches

Most basic app ever, charges money to measure in inches.
bendhowardbendhoward

PAY FOR INCHES?

This dev wants you to pay for inches. He can take 12 inches right up his @$$
Arthur's mom from ArthurArthur's mom from Arthur

ugh

annoying that you have to upgrade to get the ruler in cms.
laur !!!!!!laur !!!!!!
See 560 more reviews

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User experience

🐞

Reported Bugs

2 issues

Inconsistent measurements

Bug

Compatibility issues with newer devices

Bug
✨

Requested Features

3 requests

Ability to switch between metric and imperial units without paying

Feature

Improved accuracy for larger measurements

Feature

Removal of time limits on free usage

Feature

FAQ

What does the Ruler® app do?

Ruler® offers a comprehensive suite of measurement tools for your phone. It includes a classic ruler, a tape measure, and an augmented reality camera ruler. You can also use the photo measures mode to add measurement data directly to your images for documentation.

What are the key features of Ruler®?

Key features include a classic ruler, tape measure, and camera ruler mode for AR measurements. It supports dual units (inches and centimeters), offers precision sliders for accurate measurement of small objects, and allows you to add measurements to your photos.

Is Ruler® free to use?

The app is free to download and use, offering a range of measurement functionalities. It does have in-app purchases, suggesting that some advanced features or customization options may require payment.

What devices is Ruler® compatible with?

While specific compatibility details are not provided, the app is available on the Apple App Store, indicating it is designed for iOS devices. It utilizes the phone's camera for its AR features, so a functional camera is necessary.

How can I use Ruler® for my projects?

You can use Ruler® for various tasks such as measuring furniture dimensions, checking if an object will fit in a space, or documenting measurements for DIY projects. The photo measures mode is particularly useful for keeping a visual record of your measurements.