Hey Guys I was wondering if there is a way to redirect the user back to my iOS app after they've reached their destination with Apple maps?
If I understand correctly, what you are asking is if you can launch the Apple Maps app to give directions and then have it launch your app when the user reaches their destination. No, there is no API for this.
As KMT suggests, the way to accomplish this is to integrate maps into your own app. If you want to provide directions, you can also display the directions in your own app. Getting the directions is pretty straightforward but it would be a bit of work to create a decent navigation interface such as that provided by Apple Maps.