I have heard of two smartphone apps that will detect Chirp signals. They are GeoBeacon and CacheSense. I found the GeoBeacon app for my iPhone ($1.99), but a search for CacheSense did not return anything. Maybe it's an app only for the Android. Does anyone have experience with either of these apps?
I have a Garmin GPSR which is Chirp-capable, so I really don't need them, but they might be inexpensive alternatives for those who don't own a Chirp-capable Garmin unit and would like to be able to find Chirp caches.