The use case just from the demo on the first page looks reasonable: you're on an airplane (or a train or in a car far from civilization) and you want to look at

The use case just from the demo on the first page looks reasonable: you're on an airplane (or a train or in a car far from civilization) and you want to look at your travel itinerary/hotel's address/see the check-in time. Granted, it's pretty narrow, but not out of the realm of possibility.