Image Ruler - Measures

Maarten Labs

Contains adsIn-app purchases

About this app

Measure anything in any photo.

Take a photo or import one from your library, place a reference object you already know the size of, and instantly calculate real-world measurements — lengths, angles, and areas — directly on the image.

How it works
Set a reference line on a known object in your photo. From there, every measurement you draw is automatically calculated in real scale.

What you can measure
Ruler — measure distances and lengths
Arrow — annotate with directional measurements
Angle — measure the angle between any two lines
Area — tap points to outline a surface and calculate its area

Built for precision
Works entirely offline — no internet required
Metric and imperial units
Pinch to zoom for precise point placement
Undo and redo any change
Hide or show your reference line at any time

Tips for accurate results
For best accuracy, make sure your reference object and the object you're measuring are in the same plane, and that the camera was parallel to both when the photo was taken. Perspective distortion affects results.

Measurements are estimates based on the reference you provide.

What’s new

This is the biggest update yet — rebuilt from the ground up with a completely new look and powerful new tools.