Kirok's right, the Chirp requires the ANT technology that is in the Colorado, Oregon and GPSMap62's in order to detect, read and/or program them.
This specific technology was originally designed for use of data transfers between units, communication with Garmin's Bike Cadence sensor and the Heart Rate monitor.
Garmin came out with a USB ANT stick
https://buy.garmin.com/shop/shop.do?pID=10997&ra=true, but that was only to transfer the data from a Forerunner to Garmin Connect or the Garmin Training Center. I don't know if it works with Chirps, but that would also mean taking your laptop out for a walk. This stick costs about $50USD.
Smart phones don't have the ANT technology and Chirps/Bike Cadence Sensors/Heart Rate monitor doesn't communicate with a phone's wifi transceiver.
Here's hoping for all you iPhone users out there that they may create a dongle attachment. I don't see it being any cheaper than the USB ANT Stick.