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MacDown 3000 vs Clearance: catalog facts
MacDown 3000	Clearance
Free Free and open source.	Free Free download from the project's GitHub Releases page.
macOS	macOS
Side-by-side live preview GitHub Flavored Markdown support	Native Swift app rather than a web wrapper Handles YAML frontmatter documents
macOS only A focused editor without note organisation or sync	macOS only for now; other platforms are planned Small, young project
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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