All you need to work with bookatonce is access to the internet: Using your home PC, office computer or any other Internet-ready computer anywhere in the world. What happens though, if you don’t have a computer near by? Surely, just at that moment, a potential guest calls to ask about an available room. Now what?

iPod or iPod touch users just open their bookatonce App and check their reservation board and availabilities even if they’re on the go.
Apart from the reservation board, which you’re already familiar with from your PC, the iPhone App also allows you to check availabilities per room type.