What's In Your Pocket? Exploring Boston-Based Apps

America quietly crossed a milestone this week. Now half of all adults in the U.S. either own a tablet or a smartphone, according to the Pew Research Center.

Dovetailing nicely with the smartphone boom is the fact that Greater Boston is also experiencing a boom — in the number of companies developing apps for all those phones and tablets.

So, that inspired us to launch a new Radio Boston feature, where we'll be discovering new Boston-based apps. Our guide will be Scott Kirsner, The Boston Globe's Innovation Economy columnist.

Today, we take a look at three Boston-based apps:

- RoadAhead Highway Exit Finder
- Timbre: The Band Discovery App
- LevelUp: The Pay Phone App

Guest: