I've been using my own Google Docs spreadsheet for a few years now. My wife is a 'view only' collaborator, so if the worst happens, she can pass on access to the AAIB.
I've got it doing totals by month, year and type, originally to help me complete summaries in the paper book... But tbh, I think I'm about 3 years behind on updating it now! I just print off a month to a side whenever I need to produce written evidence, and stick that in my backup logbook (well, folder).