True Ruler

Use your cell phone as a real ruler.

Use your cell phone as a real ruler.

There are many ruler app on Google Play, but usualy they are not accurately. This ruler app can show exactly like a true ruler, in cm and inch. You choose your screen size one time and done. Next time when you open app, it remember your choice and you don’t need to choose again.

Have a ruler on your pocket to measure length, anywhere.