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