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Ruler | A Curious Tool app for iPhone and iPad


4.2 ( 992 ratings )
Utilities Productivity
Developer: Curious Hat
Free
Current version: 1.0, last update: 7 years ago
First release : 13 Jul 2014
App size: 7.04 Mb

Measure and compare objects around you!

With Ruler, users can explore and measure objects around them and learn about sizes, units of measure, and proportions.

* Simply pick a known reference object in Ruler, like a coin or a sheet of paper, then select an object you’d like to measure.
* Place these objects side-by-side and take a picture.
* Ruler provides sliders to measure the objects and compares their relative sizes.
* Switch between the US and Metric measurement system.

36 Reference objects to choose from including:
- US and World coins and paper bills
- iPhone and iPad
- Credit Card
- Crayon
- Lego and Duplo bricks
- CD/DVD
- US and A4 paper sheets
- soccer, tennis, basket, baseball, golf, football balls
- soda can

Note for parents and educators:
The app shows iAds.
If you want an ad free version of this app, please download Curious Ruler