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iA Writer vs Calmly Writer: catalog facts
iA Writer	Calmly Writer
Paid A paid purchase or subscription is required, depending on platform.	Paid Pay-once license with a 14-day trial.
Windows, macOS, Android, iOS	Windows, macOS, Linux, Android, Web
Syntax control highlights adjectives, conjunctions and filler words Plain Markdown files in your own folders, with no proprietary library	Markdown shown as formatted text Word count targets and reading time
Paid on every platform, with separate purchases in places Deliberately few features; it is not an organiser or notebook	Paid after the trial Few layout options by design
Downloadable app	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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