Selfhosted office suite with good mobile apps/ux

Hey all, I'm searching for something self hosted that lets me access, read, and edit .md and spreadsheets. I don't need functionality for presentations, word docs, or photos; really just spreadsheets and markdown, and a good mobile experience.

Opencloud is fast, simple, lightweight, and works great for multi-user editing, but Collabora is just so-so on desktop and borderline unsuable on mobile. Also, the build in split-view markdown editor is effectively unusable on mobile. Nextcloud has more features, but I mostly don't use them. It's markdown editor is better, but it has the same Collabora problem. I'm probably about 50% desktop and 50% mobile use.

Any recommendations?