so when i had my blackberry i had an app that would auto turn on wifi and connect when i was near a certain tower. example. i connect to my wifi at home.. turn on the app.. the app registers the closest tower to my wifi at home. so when my cell phone connects to that tower it auto turns on wifi and when i walk in the door.. my wifi is already on and connected to my network.. it also works the opposite way as well.. when my cell phone is no longer connected to that certain tower wifi turns off. is there an app like this for the iphone but NO jailbreaking?