Sorry for my English
I found something for the Pebble
https://apps.getpebble.com/applications/540ca9ef1120350bc20001e0
A first try showed a Cache in 1,6 km distance at 29 km distance at the Pebble
The concept looks good, but there is no way "bypassing" the coordinates from the GC App to this App - you have manually put in the coordinates
@ GC Admins: Maybe there is a way to "open" a port to connect this an other apps?!