If you're interested in running mobile checkin in "Kiosk Mode" (Version 12 and beyond) you will probably want to get rid of the browser interface when using Mobile CheckIn. 

Here's a quick demonstration video on how to accomplish this task.
Note: This webapp icon will need to be regenerated if your server IP address ever changes. Simply delete the old icon on your home screen and follow the same process to create a new icon for your new IP address. (this video is showing iOS 5/6 interface, but the share button operation is the same on iOS 7)