A good idea . but you have to get the airports to sign up to the app. Most of the parking companies are established businesses doing well so unless this app has its own parking facilities why would they sign up to this. These companies make a fortune and the people that use this facility know about the services already. Normally you have to book in advance so it is not something you just check driving to the airport. This is one app I have serious doubts over as getting the businesses on board paying for it will be another story.