https://gitjournal.io is one I'm using for mobile Markdown notes, synced via GitHub. Open Source.

Not exactly Obsidian Mobile, but should be close enough. The dev is tracking Obsidian compat issues: https://github.com/GitJournal/GitJournal/issues?q=is%3Aissue...

You'll want to look into gitjournal. It won't work well large vaults (no wikilinks)... but it works for a separate vault with the files I want on the go. That would be shopping lists and the ol' do-queue. Dendron, a vscode extension is also a great alternate/partner to Obsidian. They both have they're strengths and they play well together as they have converged on a future-proof spec of Markdown+wikilinks+LateX. Plus you can already Publish with it using 11ty! e.g: https://texdeck.com

According to the forums, there will be a mobile app eventually.

In the mean time, there are other apps that can work with your markdown files when you're away from your computer:

https://forum.obsidian.md/t/how-do-i-work-with-obsidian-on-m...

On the roadmap there are plans to introduce a lightweight mobile app in the near future. Here's hoping this will come soon but the Devs are doing a cracking job

I use Syncthing/Nextcloud to sync the notes to my phone where I use another markdown editor. It works pretty well.

It’s almost a meme at this point for all these latest and greatest note taking tools to forget mobile exists.