Folio WriterYour manuscript, everywhere:
the free iPhone & iPad app
The companion app is completely free — every feature, no trial, no purchase — because a manuscript you can only touch at your desk is a manuscript that stalls. Draft at the Mac, fix a paragraph on the train, reread on the couch; it's the same folder of files at both ends.
No server, no account — just your files
A project lives in iCloud Drive, Dropbox, or any Files location you choose. The iOS app opens it from the Files picker (the .folio package or its folder), edits autosave within a second, and the cloud service you already trust moves the bytes. Folio Writer runs no sync servers and holds none of your writing.
Merging that assumes you'll overlap
Edit on the iPad, forget, edit the same document on the Mac — the usual disaster. Folio Writer merges three-way: both edits against the version they diverged from, combined when they touch different passages. When they truly collide, a conflict copy is always preserved — the rule is that data survives and you decide, never the reverse.
What the small screens do well
The full binder (drag to reorder, swipe to trash), the card view, the inspector (synopsis, labels, status, targets), snapshots, search, and a Markdown keyboard row for citations, math, and formatting. The editor renders styled text with live preview beside it. Each device even remembers where you left off — reopen a project and you're in the document you were writing.
What it costs
Nothing, and that's not a teaser: the one-time Mac unlock covers live sync, and the iOS app itself has no purchases at all. One manuscript, every device you own, nothing to buy twice.