Is there an app that would auto redial a number if it is busy? I play tennis at my local Bally's. They have 3 indoor courts that have been newly refinished. You have to call at 5am to get a court reserved for the day, and often when I call in at 5am when they open, it is busy, and I have to keep trying. I am just looking for an app to help me from having to have to keep hitting the buttons while I'm half asleep.