Compare software

ThiefMD vs Calmly Writer: catalog facts
ThiefMD	Calmly Writer
Free Free and open source under the GPL-3.0 or later licence.	Paid Pay-once license with a 14-day trial.
Linux	Windows, macOS, Linux, Android, Web
Library is plain files on your own file system Export to PDF, ePub, docx and blog platforms via Pandoc	Markdown shown as formatted text Word count targets and reading time
Linux only Developers note it comes with no guarantees against lost files	Paid after the trial Few layout options by design
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-3.0-or-later	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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