AR Ruler
An app that measures length, angles and area through your camera.
What AR Ruler does
AR Ruler is a camera measuring app from a small Polish studio. It goes well past a simple tape: you get tools for height, distance, angles, rectangles, circles, volume and walls. It's on iPhone, iPad and Android, with over 10 million installs on Google Play.
Where Apple's Measure stops at length, AR Ruler keeps going. You can measure a line or a height, the distance to a surface, an angle, the perimeter and area of a shape, and the volume of a box or cylinder. Each tool can sit on your home screen as a widget, so the one you use most is a tap away.
On Android it needs ARCore, Google's AR support, and the Play listing says a room planner can export floor plans as PDF. On newer iPhones it can also use the LiDAR scanner for 3D scanning. Like every camera measuring app, accuracy depends on light and on how steady you hold the phone, so treat results as estimates and use a real tape for anything you'll cut or order.
The free version shows ads and limits some tools and projects. Premium removes both and starts with a 3-day trial, but the pricing is steep and confusing: the US App Store lists weekly plans, monthly plans and several yearly prices. If you only need a measurement now and then, the free version is enough. If you measure every day, compare the yearly price before you commit.
Alternatives to AR Ruler
Who it's for
Skip it if: Anyone who hates ads or weekly subscriptions.
Pricing
Free planFree to download with ads and some limits. Premium removes ads and limits and has a 3-day free trial. On the US App Store plans start at $4.99 a week, monthly is $19.99, and yearly runs from $44.99 to $89.99.
Prices can vary by country. Checked 19 Oct 2026.
What people like
- Lots of tools in one app
- Works on iPhone, iPad and Android
- Widgets for fast access
- Free version is usable for occasional jobs
Watch out for
- Ads in the free version
- Premium pricing is expensive and has many tiers
- Accuracy depends on lighting and a steady hand
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Questions people ask
Is AR Ruler free?
The basic app is free with ads. Premium removes ads and limits and starts with a 3-day free trial.
Does AR Ruler work on Android?
Yes, on phones that support ARCore, Google's augmented reality platform.
Can AR Ruler make a floor plan?
The Google Play listing says its room planner can export floor plans as PDF. For full floor plans, a dedicated room scanning app does more.
How accurate is AR Ruler?
It's fine for estimates. Good light and a textured surface help. For anything you'll cut or order, check with a real tape measure.