Folio: Markdown Library

Markdown worth reading on iPhone. Folio brings notes into one library with live preview, Mermaid diagrams, folders, tags, and Git import.

Folio is a local-first library for Markdown and plain text on iPhone and Mac. Bring notes and docs into one place, organize them with folders and tags, and read or edit with a live preview—without juggling loose files across apps.

LIBRARY & ORGANIZATION • Import Markdown and text from the Files app, or use Import from Git Link for public GitHub repos and single files. • Needs Organizing gives new imports a clear inbox before you file them. • Folders and nested structure help you group work the way you think. • Tags cut across folders so you can filter by topic or project. • Pin favorites and search your library to get back to the right note fast.

READING & WRITING • Switch between Editor and Preview to draft in Markdown and see it rendered instantly. • Format with headings, bold, italic, links, lists, task lists, quotes, and code. • Preview supports tables, images, and Mermaid diagrams. • Autosave keeps your changes as you write.

SHARE • Share a note as a Markdown file or plain text. • Rename notes and manage tags from the document menu.

Folio Pro (optional one-time purchase) unlocks unlimited folders, tags, and favorites, and works across iPhone, iPad, and Mac with a single purchase.

Whether you’re collecting research, drafting READMEs, or keeping a personal knowledge base, Folio keeps Markdown organized, searchable, and easy to open again on iPhone.