Measure anything from one photo using a card you already carry. Free, no subscription, no LiDAR needed, and your photos never leave your device.
VisualRuler turns any bank-card-sized card into a ruler for your photos. Place a card next to what you want to measure, take a picture and read real dimensions in millimeters, centimeters or inches. No LiDAR, no AR scanning, no subscription.
HOW IT WORKS
1. Lay any standard card (bank, transit, loyalty or library card) flat next to the object.
2. Take a photo, or choose one from your library.
3. Drag the four corner handles onto the card. A zoom loupe helps you place them precisely.
4. Add lines or rectangles and read the measurements instantly.
Standard cards are all the same size, 85.6 × 54 mm. VisualRuler uses that known size to correct for perspective, so you don't have to hold your phone perfectly straight.
WHAT PEOPLE MEASURE
• Furniture, shelves and frames before buying
• Boxes and parcels for shipping labels
• Clothing, shoes and fabric for online orders
• Screens, books, artwork and hardware parts
• DIY and craft projects at home or in a store
WHY VISUALRULER
• Works on iPhone and iPad, no LiDAR or depth sensor needed
• Measures from one still photo, so nothing drifts while you work
• Line and rectangle tools, as many as you need on one photo
• Switch between mm, cm and inches at any time
• Save the measured photo to Photos or share it in one tap
• A clean Liquid Glass design
PRIVATE BY DESIGN
No account, no ads, no tracking. Photos are processed entirely on your device and are never uploaded.
FOR BEST RESULTS
Keep the card and the object on the same flat surface, shoot from above when you can, and make sure each corner handle sits exactly on a corner of the card. For flat objects, results are typically within a few millimeters.
My card was not detected and I don't see how to "put" a box around the thing I want to measure after boxing in the card.
Developer Response
Dear UserThank you very much for the review and I am really sorry that the app did not met your expectations.We have done many changes and improvements to the version. Also new onboarding experience explaining how the app works was added.Please give it a try once moreThank you againDev
Accurate, but used cellular data
Leodavinci0
I tested this with a card other than a credit card and it is accurate. However, I tested it with wifi off to see if it is using the Internet and it did use 24 KB of data, which would only be enough data for a very low resolution picture to be sent. To gain trust of the users, you may not want to have the app use data. Users should be sure not to use any cards with personal info.
Good idea
Emeraldel
It took many tries to figure out how to use this. Once you realize you need to push the plus sign to measure something, whether it's a box or line, after you've encircled the CC, it will work. If you are not directly over the object to be measured when taking the photo, boxes won't measure accurately. If you need a measurement without having a tape measure or ruler, it can be a great help, but I'd try to be on wifi if you could.
Very interesting idea!😄
Ackerman.L
Although it is not working perfectly at the moment, I am giving it 5 stars for the innovative idea and hoping for the updates for improvement!
VisualRuler has been rebuilt from the ground up.
• New Liquid Glass design that is cleaner and faster to use
• Take a photo or import one from your library
• Place card corners precisely with the zoom loupe
• Measure with lines and rectangles, as many as you need
• Switch between mm, cm and inches at any time
• Save or share your measured photo in one tap
• Layouts tuned for iPhone and iPad
Enjoying VisualRuler? A quick rating on the App Store really helps.
Version 3.7
The developer, altaibayar tseveenbayar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
altaibayar tseveenbayar
Size
11.4 MB
Category
Utilities
Compatibility
Requires iOS 26.6 or later.
iPhone Requires iOS 26.6 or later.
iPad Requires iPadOS 26.6 or later.
Mac Requires macOS 26.6 or later and a Mac with Apple M1 chip or later.
