Crew connect and MCCpilotlog. Have the enterprise version of MCC and so I don't bother manually keeping a logbook anymore. I just go into the pc app and download regularly - it is smart enough to know when you last did this and pick up the actual chock to chock times, reg numbers, pilot names etc. Job done. It goes into the cloud so in theory if you have a HDD failure then there is an offsite backup but I personally keep a backup of the logbook file. One day I might even print the thing out and get it bound if I can be bothered.