My problem with the app is~~ VERY long to get signal (like others have complained about) and I had a battery issue dealership says battery is fine but my app still says "check battery" on both my Iphone5 and my IPhone 4... So I know it is NOT the phone. The guy at the service department at Lincoln said he did not even know there was an app. This happened this past Tuesday, so the app and MKC have been out long enough he should know about it! ...Has anyone else had this issue?