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iA Writer vs 1Writer: catalog facts
iA Writer	1Writer
Paid A paid purchase or subscription is required, depending on platform.	Paid A paid app on the App Store.
Windows, macOS, Android, iOS	iOS
Syntax control highlights adjectives, conjunctions and filler words Plain Markdown files in your own folders, with no proprietary library	Works on plain text and Markdown files you own Dropbox, WebDAV and iCloud Drive sync
Paid on every platform, with separate purchases in places Deliberately few features; it is not an organiser or notebook	iOS and iPadOS only No Android or desktop version of its own
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.