Available on iPhone
Measure anything
from a photo.
Place a known object in the frame — your phone, a card, anything with known dimensions. AI Extend fills in what the photo missed.
Available on iPhone
Place a known object in the frame — your phone, a card, anything with known dimensions. AI Extend fills in what the photo missed.
Use cases
Shipping &
packaging
Online
selling
Home
& DIY
Interior
design
Field
notes
The result
Width, height, every measurement you tap — labeled on the image and ready to share.
Precision
Zoom in to place reference edges and measurement points exactly where they belong. A magnifier follows your finger so the marker never hides under your thumb.
Real-world accuracy starts with a clean tap.
AI Extend
Trees, packages, furniture — sometimes you can't fit it all in one shot. AI Extend reconstructs the scene around your image so you can finish measuring without retaking the photo.
Pick Medium for balanced cost, or High for a sharper result.
How it works
A camera doesn't know how big anything is — until something in the photo does. Drop in a credit card, a coin, an iPhone, or any object with known dimensions, and RefScale uses it to set the scale.
Every other measurement in the frame falls into place from there.
Everything else
Cards, every iPhone model, common objects — or define your own custom size.
Switch units instantly. Every measurement on the photo updates in real time.
Tag each measurement with text so the photo explains itself when you send it.
Open the app and start measuring. Purchases and restore work without registration.
FAQ
RefScale gives approximate measurements. For best results, keep the reference and measured object on the same plane and take the photo straight-on.
Photos used only for measurement stay local. AI Extend uploads the selected image so the extension can be generated.
Use an object with known dimensions, such as a payment card, supported iPhone model, or custom reference size.
Flat, visible objects work best: boxes, furniture, prints, parts, and similar everyday items. Keep the reference next to the object for the most useful estimate.
Millimeters, centimeters, inches, and feet. Switch instantly — every measurement on the photo updates in place.
When your photo cuts off the scene, AI Extend helps generate more surrounding image area so you can continue working without retaking the shot.
Yes. Export the annotated photo with every label burned in, or share it straight to Messages, Mail, or any app that accepts images.
Free
$0
Pro Monthly
Popular$5.99/mo
Pro Yearly
Save 30%$49.99/yr
$4.17/mo billed yearly
Free to download. No account required to get started.
Download on the App Store