From the booklet (http://owntracks.org/booklet/guide/whathow/ http://owntracks.org/booklet/guide/whathow/): > When the device determines that it's moved a sign

From the booklet (http://owntracks.org/booklet/guide/whathow/ http://owntracks.org/booklet/guide/whathow/): > When the device determines that it's moved a significant distance, it contacts a server via 3G or WiFi (hopefully one of those is available, but we queue messages many thousands on the app until connectivity can be established) and says "hey, I'm here", whereby "here" is specified with a bit more precision.