Apps of the Week: Gumtree, Amtrak, OpenSignal and more!

We're in that slow transitional phase between CES and MWC, going through the motions of weird leaks and random product releases. Fear not, as the Apps of the Week posts will continue on regardless. You come here each Saturday to see what apps the Android Central staff are finding and using, so we do our best to find some great picks. Hang around after the break and see how we did this week.