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Heynote vs Znote: catalog facts
Heynote	Znote
Free Free download with source code on GitHub.	Free Free to download and use.
Windows, macOS, Linux	macOS
Blocks with per-block language, highlighting and auto-format Built-in calculator blocks with units and currencies	Works on plain local Markdown files Runnable JavaScript code blocks inside notes
A scratchpad rather than a full note organiser or editor	Maintained by one developer AI features depend on configuring a model provider
Downloadable app	Downloadable app
Closed 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 2, 2026

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