Im assuming your trying to develop this for private use? Because surely you realize Apple would NEVER allow that on the app store.
Do you need to ask that? That would be illegal.
Let me think. There is an app. It's called: Stalking someone leads to criminal prosecution. Only 99 cents.
LOL. this is illegal because imagine you having some creeper knowing where you were every second of the day....its an invasion of privacy and is pretty much the same as stalking. if you have a family member like a kid who you want to know where he is at times...you can get mobileme and it includes a find my iphone feature...but u'll have to get ur kid an iphone too. or you can get familytracker for like 5 bucks...its not that accurate though...Want to go to prison? There's an app for that.
You sound like a stalker trying to find a g/f or b/f so you can do something nasty. I only hope you don't go through with whatever criminal activity you are planning.
The emphasis is on permission. The OP wants an application that will track another person's location without their knowledge or consent. You can't possibly be comparing my geotagging my own photos or intentionally posting my location on a social networking site to someone I don't even know being able to remotely and clandestinely track my real-time position.Technically they do when an app allows GPS coordinates, I have a camera app that does that) and any social networking app. Hell Shazam will also allow your location if you say it's ok. [emphasis added]