The one measuring tool every iPhone needs. Just place a card, snap a photo and get instant dimensions. No LiDAR, no AR, no account. Works on every iPhone.
You already have the ruler. You just did not know it was in your wallet.
Ruler App turns any standard card into a precision tape measure. Place your bank card, transit card or library card next to anything you want to measure, take a photo and get real dimensions in millimeters, centimeters or inches. No LiDAR. No depth sensor. No AR tricks. Just your iPhone and a card you already carry every day.
HOW IT WORKS
1. Place any standard card next to what you want to measure.
2. Open the app and point your camera. Card detection is instant and automatic.
3. Fine-tune the card corners with a drag for perfect precision.
4. Tap to place a line or rectangle. Read dimensions immediately.
That is it. Four steps to a real measurement, anywhere you are.
THE MEASURING TOOL EVERYONE NEEDS
Measure furniture before you buy it. Check whether a shelf, frame, rug or appliance will actually fit. Get accurate package dimensions for shipping labels. Measure clothing sizes from a photo so online orders fit the first time. Capture DIY project sizes at home, in a store or on site.
Professionals rely on it too. Architects verify site dimensions before ordering materials. Interior designers confirm furniture fit before committing. Stylists measure garment details from lookbook photos. Ecommerce sellers get accurate parcel dimensions fast. Product developers capture prototype measurements in the field.
WORKS ON EVERY IPHONE
No LiDAR sensor required. No depth camera. No special hardware at all. If your iPhone has a camera, this ruler app works. That includes every iPhone and iPad ever made.
WHAT YOU CAN MEASURE
Furniture, clothing, electronics, artwork, parcels, hardware parts, plant pots, books, screens and anything flat. Draw a line measurement for a single dimension or a rectangle to capture width and height at once. Switch between mm, cm and inches at any time.
WHY EVERYONE SHOULD HAVE THIS APP
• Replaces a tape measure when you cannot find one
• Works on every iPhone and iPad without LiDAR or any depth sensor
• Instant automatic card detection gets you measuring in seconds
• Draggable card corners give you precise control
• Millimeters, centimeters and inches with instant switching
• Measure from photos already in your photo library
• Fully offline and completely private
ACCURACY
Typically 1 to 3 mm for flat objects photographed straight on. Powered by the same projective geometry used in professional photogrammetry software.
PRIVACY
Zero data collection. No analytics, no crash reporting, no account, no subscription. Every photo is processed entirely on your device and never leaves it.
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.
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 4 is a complete rebuild from the ground up.
• Redesigned from scratch for a cleaner, faster and more intuitive measuring workflow
• Smarter card detection with real time confidence feedback
• Instant auto lock freezes the frame automatically when the card is found
• Refined corner dragging lets you recalibrate at any time without losing measurements
• Support for both metric and imperial units
• Photo library import lets you measure from existing photos, not just live camera
• Built for iOS 18 and optimized for the latest iPhones and iPads
Version 3.4
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
12.7 MB
Category
Utilities
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
iPad Requires iPadOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
