As those of you well-travelled will be more than aware, the business of checking in, collecting luggage, waiting around and dealing with cancellations, gate changes and unforeseen delays tends to be part and parcel of the whole experience of catching a flight. To make things easier, there are an abundance of helpful apps purporting to keep us as informed as we need to be, and one of the most popular – FlightBoard – has just gone free for a very limited time only.