mobile alert

So this is my idea...
A module which is paired with my mobile via bluetooth. whenever I get away from the mobile or am not in range of the mobile it starts to vibrate until i am back in the range. Is it possible to execute this using bluetooth? and most importantly what would one call this thing? :stuck_out_tongue:

I see a relatively easy way to do this. Get an HC-06, and write an android app. Have the HC-06 communicate every few seconds a message, and the phone every few seconds check for it. If the phone checks and doesn't find a message, have it vibrate. Voila. This doesn't work with iPhone, FYI.