Pocket Prose is a writing app for Android. If you write and don't know what Markdown is, this app might be for you. If you're looking for a Markdown editor with a preview pane, it might not. Point it at a directory full of Markdown files or start building your notebook from scratch — no storage permission needed. Notes are filed by the tags in their frontmatter, nested with /, and nowhere else. Uninstall it and the folder is byte-identical to how it found it, apart from edits you actually made. It was built for a personal archive of lyrics and prose, a couple of hundred notes written over years, which is why it is opinionated about leaving things alone. Early-stage release — expect rough edges. Feedback and bug reports welcome via Issues. <b>What it will not do</b> This is the point of the app rather than a list of missing features. * No renaming files to match their titles, no injecting IDs or app-owned keys into frontmatter, no rewriting frontmatter it did not itself change. * No importing into an internal database. No required folder layout, naming scheme or index file. * No auto-deleting a note because its file vanished, and no auto-merging when one changes underneath it — a synced folder does that. Conflicts are surfaced, never resolved for you. * No cloud account, no telemetry, no network permission. <b>Filed by tag</b> * A tag tree read from the frontmatter tags: list and nothing else. F# in a lyric is a sharp; a #hashtag in the text is text. * Nesting with /, filtering by a parent takes its children, and a tag can be renamed across the folder — the children go with it. * Pin a note by tag: notes carrying the pin tag sit at the top of the library, whatever the sort. It is an ordinary tag in every other way, so it syncs with the note and outlives the app. * A folder that still keeps its tags and titles in the text — as another editor's export left them — gets a one-time offer to move them into the frontmatter, with a count of what would change. The zi