All Debra Monck wanted was a tool that would help her students learn the difficult subject of measuring. Conventional rulers just didn't work, the Pohatcong Township, N.J., woman learned during her 22 ...

Smartphones are useful for a lot of things. You can even use one as a ruler in a pinch. Generally speaking, you won’t replace your trusty yard stick. A phone is simply too small for anything other ...

Your smartphone can not only serve you as a digital ruler, but it can also help you measure various other things. Smartphones are very powerful tools, especially if you pair them up with good apps. In ...