I use an iPad app called Australian Pilot Logbook. It is only $29.95 and comes with all the goodies - it will let you know when any approaches / night take-offs or landings, medical, instrument time, IR etc etc are about to expire. It backs everything up on icloud and is very simple to use, it even has the option to save favourite sectors and co-pilots if you are flying multi-crew.
From memory, you can get a free version but it is limited to aircraft (I think).
Well worth it.