This is exactly how I do the very same thing, and same as yourself, it's been working pretty much flawlessly for me since day one. Mine's Linux + Android, but I assume the same would work across any operating systems supported by SyncThing and KeePassXC.

I went with this combo as well. My requirement was to sync my password database across multiple platforms (Windows, Linux, MacOS, and Android). KeePassXC works great on all the desktop OSes, and there's a couple choices for Android apps (I chose Keepass2Android).

It does have downsides, mostly around Syncthing: it's a bit of a battery hog and there's no iOS app. If either one of those ever becomes enough of a problem for me I can just switch it out for one of the more normal cloud storage providers though.

I use KeePassXC (strongbox on phone) + Nextcloud. Everything is wonderful except for nextcloud hiccups. I recently uploaded a resume and realized after it sent that the metadata was incorrect and a local file rename must have been overwritten. Embarrassingly, I had to send an email with the right resume. I sent it from my phone. Right after I checked on the sent email and found that the nextcloud file through ios files uploaded 86 bytes of junk rather than my resume, so I had to send another email.

Indeed. On Android I'm using Keepass2Android Offline which doesn't even declare internet permissions, works great.

I do this as well with syncthing.

I have a PCengines box at home running wireguard that also runs an always on instance of syncthing so I can sync to and from my home network from a Starbucks or wherever.

It takes a little setup but once that's done it's very much "fire and forget".

Same here. Been my setup for almost 10 years. Encrypted db file in an encrypted volume. Multiple offline and online backups.

I have the same setup. One question, is there a Syncthing solution for iOS devices?

Apparently it's the longest running Issue on their Github: https://github.com/syncthing/syncthing/issues/102

Edit to add:

There is Möbius Sync [0] but I didn't have much success with it. It did work but not quite the way I wanted so eventually I just deleted it.

On Reddit [1] people suggest all sorts of workarounds using other sync tools, like iCloud or NextCloud. Not ideal.

[0] https://www.mobiussync.com/ [1] https://www.reddit.com/r/Syncthing/comments/ese82l/ios_users...

I looked into this a while back and Syncthing does not have an iOS app.