Running single app on mobile devices

Apple
Accessibility, Guide Access
http://support.apple.com/kb/ht5509


Android
https://play.google.com/store/apps/details?id=com.gears42.surelock
http://www.gakshay.com/2013/01/14/run-android-as-kiosk-or-single-application-mode/
http://stackoverflow.com/questions/4081264/is-it-possible-to-configure-an-android-install-to-run-a-single-app/4081326#4081326