This is a project for Android Devices
Challenge: https://devart.withgoogle.com/#/enter-now?utm_campaign=en&utm_source=en-tw-all-all-so&utm_medium=tw http://stackoverflow.com/questions/7715057/how-to-make-compass-point-to-my-particular-latitude-longitude-location-based-on http://stackoverflow.com/questions/7173925/how-to-rotate-a-direction-arrow-to-particular-location http://stackoverflow.com/questions/8502795/get-direction-compass-with-two-longitude-latitude-points
<> Latitude Longitude
refrences: http://webdesignergeeks.com/mobile/android/geting-current-location-in-android-application-using-gps/ http://www.vogella.com/tutorials/AndroidLocationAPI/article.html#locationapi http://developer.android.com/guide/topics/location/strategies.html http://sunil-android.blogspot.com/2013/02/create-our-android-compass.html http://stackoverflow.com/questions/2227292/how-to-get-latitude-and-longitude-of-the-mobiledevice-in-android
<> http://www.javacodegeeks.com/2013/09/android-compass-code-example.html http://www.vogella.com/tutorials/AndroidSensor/article.html http://stackoverflow.com/questions/8734190/android-compass-example
<> http://www.mkyong.com/android/how-to-send-sms-message-in-android/ http://stackoverflow.com/questions/848728/how-can-i-read-sms-messages-from-the-inbox-programmatically-in-android
similiar app: https://play.google.com/store/apps/details?id=bg.angelov.send.my.location https://play.google.com/store/apps/details?id=com.decrux.android.latconv https://play.google.com/store/apps/details?id=com.fsecure.lokki
<> http://www.movable-type.co.uk/scripts/latlong.html http://stackoverflow.com/questions/27928/how-do-i-calculate-distance-between-two-latitude-longitude-points http://www.sunearthtools.com/tools/distance.php