@OSSKI I use a pilot logbook tool that backs up to a CSV file every night and gets uploaded to my Google Drive. I pay a small yearly donation to get the backup service otherwise the app is free for anyone to use. The backup CSV is just another way to save the data and not used for anything within the app. Most pilot logbooks will import CSV if I ever need to change programs. For your reference, the site is https://myflightbook.com/logbook/Default.aspx The owner of the site started out much like you but has turned it into much more. This should give you some ideas on where you may want to take this.
I would still like to know if you can add the "Plus" option for ZO. Another nice feature would be to add a user defined rating system that would allow the user to easily get back to notes from an extremely important set. Basically, in my paper ski logbook I put one, two, or three stars next to the set so that I can easily look back to sets containing important notes or keys. I also bend over the corner of the page that has the really important stuff. This makes it really easy to get the information needed to get back on track when you find yourself in a slump. After all, that is really the value of a logbook!