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Zettlr vs iA Writer: catalog facts
Zettlr	iA Writer
Free The open-source software is available without a license fee. Hosting, hardware and…	Paid A paid purchase or subscription is required, depending on platform.
Windows, macOS, Linux	Windows, macOS, Android, iOS
Combines document navigation with flexible export workflows.	Syntax control highlights adjectives, conjunctions and filler words Plain Markdown files in your own folders, with no proprietary library
Some publication formats require additional export dependencies.	Paid on every platform, with separate purchases in places Deliberately few features; it is not an organiser or notebook
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 September 22, 2026

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