Ruler •

Ruler •

Includes Camera (AR) Ruler

399 ratings
27 reviews
Free
With Ads

Details

  • Released
  • Updated
  • March 5, 2021
  • April 16, 2026

Features

Ruler • screenshot #1 for iPhone
Ruler • screenshot #2 for iPhone
Ruler • screenshot #3 for iPhone
Ruler • screenshot #4 for iPhone
Ruler • screenshot #5 for iPhone
Ruler • screenshot #6 for iPhone
Ruler • screenshot #7 for iPhone
Ruler • screenshot #8 for iPhone
iphone
ipad
🖼️Get Icon
Icons↘︎

About

Measure objects and distances with an on-screen ruler and augmented reality. Supports inches and centimeters, with features for linear sizes, angles, area, volume, and more. Save your measurements for later use.

On-screen ruler for small objects
Augmented Reality (AR) measuring
Measure linear sizes in cm/inches
Calculate angles, area, and volume
Save measurements
Generate plan projections
Show original description

What's New in Ruler

1.5

April 16, 2026

Fixed crash bugs

User reviews

The app still crashes

The app still crashes on my iPhone 17 and IPad after restarting tried everything whenever I measure the height of something, could you please make a new app update? It still hasn’t been fixed yet.

Response from developer

Thank you for your feedback, and we’re sorry for the inconvenience. We understand that the app is crashing on both iPhone and iPad when measuring height. This is not the experience we want, and it may be related to device-specific AR processing or a bug in the measurement module. Please make sure you’re using the latest version of the app and restart your device. If the issue continues, contact our support team with your device models and iOS versions so we can investigate and fix it. Thanks for reporting this — it helps us improve stability.

Basically a sales tool.

Will do nothing except measure 5” without paying. Cannot even switch to metric.
The App world is dying due to the endless useless apps like this one.

Response from developer

Thank you for your feedback. We're sorry the app didn't meet your expectations. Could you please let us know which phone model you're using? This information will help us investigate the issue. We appreciate your comments and are always looking for ways to improve the app and user experience.

Mostly ok

Simple basic app. Displays inches and cm scales. Nice basic caliper usage too and bonus spirit level. But no clue how to use AR mode. Camera on, screen shows green grids and nothing more. No save or print ability. Unable to select objects. Unable to back out of AR mode.
Using iphone 15 pro max with os 26.5.
Show more

Response from developer

Thank you for your feedback, and we’re sorry for the confusion and inconvenience. We understand the issue with AR mode not responding as expected, including the inability to select objects or exit properly. This may be related to device compatibility, ARKit initialization, or a UI control issue on certain iOS versions. We also appreciate your suggestions regarding save/print functionality and improving usability. These are valuable improvements and will be considered for future updates. Please ensure you are using the latest version of the app, and if the issue persists, contact support with your device details so we can investigate further.

All his/her gadgets

They all work well so far also has selection to Do not sell information or share my data I download all free ones testing came out well so far

Response from developer

Thank you for your feedback! We’re glad to hear the apps are working well for you and that you appreciate the privacy options, including the “do not sell/share data” setting. It’s great to know your testing experience has been positive so far. Your support means a lot to us!

Tracking / ads

This is not an app for me

Response from developer

Thank you for your feedback. We’re sorry the app didn’t meet your needs and appreciate you giving it a try.

Developer apps

FAQ

What can I measure with this app?

You can measure linear sizes in centimeters and inches, distances using augmented reality, angles, area, perimeter, volume of 3D objects, and the length/area of paths. It also includes an on-screen ruler for measuring small objects directly on your smartphone's screen.

How does the Augmented Reality (AR) feature work?

The AR feature allows you to accurately measure distances from your device's camera to points on a detected 3D plane. This enables you to measure larger objects or spaces that wouldn't fit on your screen.

Is this app free to use?

Yes, the app is free to use. However, it does display advertisements to support its development and maintenance.

Can I save my measurements?

Yes, the app allows you to save your measurements. This is useful for keeping track of dimensions for projects or for future reference.

What devices is this app compatible with?

While specific compatibility details are not provided, AR features typically require devices that support ARKit (for iOS) or ARCore (for Android). The on-screen ruler functionality should be broadly compatible with most smartphones.