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Antinote vs Heynote: catalog facts
Antinote	Heynote
Paid A one-time $5 purchase with lifetime updates and a free trial.	Free Free download with source code on GitHub.
macOS	Windows, macOS, Linux
Opens instantly on a global hotkey Inline math with variables and unit and currency conversion	Blocks with per-block language, highlighting and auto-format Built-in calculator blocks with units and currencies
macOS 14 or later only; iOS version not yet released Built for temporary notes rather than long-term organisation	A scratchpad rather than a full note organiser or editor
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it 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.