Can this be used in a mobile app that could go offline for long periods?

I'd like to build an app that allows a user to edit encrypted journal entries. If they edit an entry on their computer while offline, edit the same entry on their phone while offline, and then both devices go online, I'd like those two entries to be reconciled.

The readme suggests this project can handle delays and race conditions/does some form of reconciliation, but it doesn't seem to be designed for long periods of users being offline. Is that correct? If it's not set up for long periods of being offline, do you have a rough idea how hard it would be to make that work?