Justin, I don't think you have to run any other app other than the vision one to recalibrate. I have the S4 and when I see my heading is wrong after starting up the vision application, I just rotate the phone 3 times in all 3 axis. It resets the compass without other GPS software running. You have an S5 so maybe it's different. But its worth a try so you don't have to have multiple applications running.