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ciphernotes

Name: ciphernotes
Author: Raphael Nußbaumer BSc

Raphael Nußbaumer BSc

Client-side encrypted notes that sync across devices.

Productivity
FOSS
Free
No ads
No tracking

Android only

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Ciphernotes is an end-to-end encrypted notebook that keeps your text safe even when it syncs through the cloud. Every note is encrypted before it leaves your device, so the server only sees ciphertext.

Developer: Raphael Nußbaumer BSc
Website: ciphernotes.com
Source code: github.com/rapnuss/cipher-notes
Added to AppCosmos: 9 October 2026
License: AGPL-3.0-only