With logten mobile you MUST have a MAC to be able to use the new 2.0 mobile software, especially if you are going to import your current logbook from logbook pro. So in addition to the logten mobile 2.0 app (that does not require internet) $39.99 and logten 4 for mac $99 you are set- just need the money and a mac.
Still looking for a way to have a logbook for iphone plus PC...