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Octarine vs Notenik: catalog facts
Octarine	Notenik
Freemium Free to download, with paid features offered; see the site for details.	Free Free with no in-app purchases, subscriptions or ads; source code under the MIT license.
macOS	macOS
Notes kept as local Markdown files Core features built in without plugins	Notes stored as plain text files you can open anywhere Wiki-style links between notes
Download offered for macOS only Opinionated design with fewer configuration options	Mac only Sync depends on a third-party service you set up yourself
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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