It's an amazing tool: Use it!
The pocket of the average person contains more computing power than was available to the entirety of NASA when it landed humans on the moon in 1969. But what does that computing power get used for?
Not nearly as much as it can.
Smartphones pack some amazing hardware, and a lot of it performs tasks invisibly without the slightest bit of user interaction. Gyro sensors, barometers, geomagnetic sensors--those are a few of the components packed into the modern smartphone (available sensors differ per model).
Here are 10 apps that turn your Android phone into the closest thing we have to a modern-day Star Trek Tricorder.