Free on iPhone and iPad — and now opens end-to-end encrypted shared projects: your words decrypt on your device. Passcode-protected links prompt right in the app.
Folio Writer is a plain-text writing studio for long-form work — scholarly manuscripts, books, and novels. This is its iPhone and iPad companion: the same projects, the same files, in your pocket.
Open a project from iCloud Drive, Dropbox, or any Files location and pick up exactly where you left off on the Mac. Everything you write is a plain Markdown or Typst file you own, synced through your own cloud — no accounts, no lock-in.
WRITE ANYWHERE
- A Markdown key bar puts #, *, links, code, and $math$ one tap away — no hunting through the keyboard.
- Typewriter scrolling and sentence focus for drafting on the go.
- Live word count and writing targets for each document, the whole draft, and each session.
- Hardware-keyboard shortcuts on iPad.
YOUR WHOLE PROJECT
- The full binder: browse, open, rename, reorder by dragging, indent and outdent, and create new documents from templates.
- Snapshots you can take, browse, compare, and restore — nothing you write is quietly lost.
- Project-wide search across every document, title, synopsis, and note.
CITATIONS & PREVIEW
- Insert citations from the project's BibTeX files by author, year, or key.
- Preview the rendered document — headings, tables, images, and LaTeX math typeset with KaTeX — right on the device.
- Preview a single section or assemble the whole manuscript.
MADE TO SYNC WITH THE MAC
- Opens the exact same .folio projects as Folio Writer for Mac, byte-for-byte.
- Automatic, conflict-safe syncing: edits made on two devices merge when they don't overlap, and a losing copy is always preserved and recoverable.
- Compiling to PDF and Word stays on the Mac (those tools are desktop-only) — but your writing is always in sync.
PRIVATE BY DESIGN
- No analytics, no trackers, no accounts. Your manuscripts never leave your own devices except through the cloud service you choose.
Folio Writer for Mac is required to compile finished documents. The companion is for writing, organizing, and reviewing your projects wherever you are.
Ratings & Reviews
5.0
out of 5
2 Ratings
END-TO-END ENCRYPTED, IN YOUR POCKET
Open an end-to-end encrypted shared project on iPhone or iPad: documents, binder, and research files decrypt on your device with the key carried in the link — the server stores only ciphertext it cannot read. Live co-editing stays sealed, and the project is byte-identical with the Mac and the web.
PASSCODE-PROTECTED LINKS
A shared project protected by a passcode now asks for it right in the app when you open the link — the same prompt-and-retry the Mac has.
ALSO
- Split at Selection, Duplicate, and Copy in shared projects now push the new document's text to every device, not just its title.
- Stability and localization improvements.
Version 1.9.0
The developer, Bin Chen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More