not_amm

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.

I've been looking into continuing or updating old programs that don't have maintainers in the FSF/GNU list, but the mailing lists and archaic webpages don't help much.

I'm still learning, but I'm tired of not seeing enough good FOSS alternatives or only discontinued ones.

I don't know if muPDF Viewer is, technically, free software, but i use it for the completely minimal UI. You can only read and search, it's very limited in a good way.