App request: note-taking app
with support for simple drawing, markdown, notebooks, common audio/video formats playback and capture, Nextcloud sync, tags, search, calendar, tasks and reminders.
In KDE/Qt universe there are already apps that do all of those things but not in one app; QOwnNotes does markdown, search, tags and Nextcloud but it's a desktop-only app. Karbon does SVG drawings. Buho does basic notes in mobile form. OpenTodoList does tasks and sync.