Syncing files that you may open in both (or more) devices at the same time is unsafe with any service, but you can manage to avoid sync conflicts with KeePass if you do not open the same file at the same time or open the Android app in read-only mode. I’ve only had like 3-4 conflict files this year and they weren’t important.
It was. Fossify is now a suite, forked from the “Simple Mobile Tools” apps suite, after it was sold to ZipoApps. You can check the discussion thread here:
https://github.com/SimpleMobileTools/General-Discussion/issues/241