Mobile offline sync is a lost cause. The dev environment, even on Android, is so hostile you'll never get a good experience.

Joplin comes close, but it's still extremely unreliable and I've had many dropped notes. It also takes hours to sync a large corpus.

I wrote my own web app using Axum and flask that I use. Check out dokuwiki as well.

I use logseq. But I'm not entirely happy. Automation of processes is a pain in the ass. Mobile is buggy.

Silverbullet for web access (including mobile pwa) and syncthing + markor on android.

Yes syncthing is well and alive on android (to prevent the usual posting "its dead on android", no it's not)

Joplin has a pretty slow UI and it doesn't save notes in standard markdown format.

@ocean maybe @notesnook is something for you.
It's even E2E encrypted in case somebody got access to your server or so.

https://github.com/streetwriters/notesnook-sync-server?tab=readme-ov-file#notesnook-sync-server

Obsidian and it syncs to my home server

I use Obsidian with the obsidian-live sync docker container to sync data between devices instantaneously. It is not open source but they store plaintext markdown notes and its extendable with plenty of open source plugins.

I've used Logseq for 2-3 years but it's slow and a pain to use on mobile. I discovered Tiddlywiki in December, I love how customizable it is, but it's been taking me a while to tweak it to match my usual workflow. Running it via nodejs server on android (termux) and laptops (so I'm accessing it on localhost on all devices) and syncing the wikis between devices using Syncthing.

I've used a bunch, but I eventually moved to SilverBullet and will probably stick with it.

org-roam but logseq is good too.

I use Joplin for day-to-day: to-dos, journals etc. I like Joplin, but I haven't tried the others. I tend to be sticky with services, if something "works" I don't go looking for better. Only when I have a specific problem I can't solve do I branch out.

I use bookstack for documentation on the server, faqs guides, updates etc. perhaps that works for others. The lack of android app is what moved me to Joplin.

Flat notes. I’ve tried a bunch of different more complex apps but I keep coming back to flat notes.

https://github.com/hoarder-app/hoarder