I use KeepassDX on family mobiles with Syncthing for copies between laptop and phones. What would i gain moving to Vaultwarden, knowing that i would never open my network to the outside world? It would be easier to manage for sure, as im having to setup phones and laotops myself in the family and worry that they do silly things like turn off syncthing. But what about offline access to passwords? Does Bitwarden mobile client keep a local copy of database until it can sync?


Doesn’t it only lead to problems if you change the same exact data on both copies to different values? It literally never happened to me, I never had a merge problem. It always just asks me to merge, I say yes, and that’s it.
Oh wait I use KeepassXC not DX, dunno what the difference is
KeepassXC is password manager for desktop computers and KeepassDX is application for Android phones.
Ah, for Android I use Keepass2Android which also seems to handle external changes perfectly.
The problem is that syncing between devices is not implemented in KeePass itself but through an external tool (Nextcloud, Syncthing, or whatever else). The sync client will only see the ciphertext and won’t be able to tell which records have been changed, only that two different binary files have a common ancestor and are in conflict.
The most obvious solution is to lock and close the database when it’s not in use (which is a good practice from a security perspective too), and to sync immediately when it is changed.
Idk what to tell you, but to me the merging is definitely implemented inside keepass itself, Keepass asks me if I want to merge the external changes and does so well.