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Notes TechNotesnook
Free

Free and open source under the Apache-2.0 licence.

 Freemium

A free tier covers unlimited notes and sync across devices. A paid Pro subscription adds…

Android Windows, macOS, Linux, Android, Web
  • No internet permission and no account
  • Encrypted database with per-folder vaults
  • End-to-end encrypted on device with XChaCha20-Poly1305 and Argon2, so the service holds no readable data
  • The full client codebase is published, which makes the privacy claim auditable
  • Uninstalling the app permanently deletes all notes
  • No sync between devices
  • An account is required; it is a sync service, not a local-only app
  • Encryption means no server-side search, and losing your password loses the notes
Downloadable app Downloadable app, Web application
Open source Open source
License: Apache-2.0 License: GPL-3.0
No account needed Account needed
Works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

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