There are five categories of tools in the app: tools for measuring lengths and angles, distance, light, a compass, and sound and vibration. The basic premise is that with the app, you’ll be able to measure, level, project, and navigate, to your heart’s content.
Although there are some slight flaws in the tools (mainly as a result of the Android device), they’re still very accurate, and in a short pinch, able to work for what you need. I think the most difficult, and probably least useful of the tools is the ruler. That’s not to say it’s not a good addition to the app. Like many ruler programs, it’s difficult to use, and very limited in its overall usefulness.
Aside from my gripe with the ruler, the remaining apps are quite useful, especially the flashlight, which includes options for screen or LED light.
If you want to have some more fun, or you want to be a real bore, measure the decibel levels around your home, work, and general environment. I guess, if your neighbor’s throwing a wild party, you can report the sound violation to the police too.
Admittedly, the tools aren’t ones you’ll particularly use on a regular basis, but they’re helpful when you need a general idea.