No good for iphones, but for android, locale can tweet / email / sms a gmap link to your location, triggered by timer / location (GPS or network derived) /incoming text (code word or contact filter) / incoming email (code word or contact filter). You can combine the triggers and outputs too. When out on a rode, I have my phone set to sms my location every hour and whenever my wife texts me. Did set it to tweet too, but network coverage was very limited when I tried, and I have 3000 texts a month that I never use.