This app is really cool. It keeps a record of every place your phone has been. It keeps a history of your last 100 locations and you can see them on a password protected google maps interface. Runs in the background. There is an iOS bug however so you must delete and reinstall the app once after you install it. After that no problems and this is very easy to do. Its free to reinstall apps even though you have to click "buy"
Bdblackwood about FoneHome - A Phone Tracker to Find and Locate Your Lost or Stolen Device