Vueling's parachuting app
Well...the app is not really about parachuting, but Vueling has put together a nice video showing how it takes less than a minute to book a flight through their mobile app, even if you are...uh...in the middle of a parachute jump!
Haven't done the jump myself (yet!) but I have used the app to book and it is, indeed, quite easy and simple to use.
Great timing to advertise this expertise since Barcelona, Vueling's home, is hosting the Mobile World Congress these days (and, like the rest of Barcelona's travel industry, Vueling is working at full capacity because of this event, adding up to 63 extra flights to carry the attendees)