About Tuisku
Tuisku is an Android notes app that encrypts notes using the ChaCha20 algorithm. Notes are stored internally in encrypted form, and the app provides a place to view the encryption key in its settings. This creates a simple local workflow for keeping short notes in an encrypted format. Users can share a note through the Android share action if they choose to send it elsewhere. Shared notes are sent unencrypted, so sharing changes how the note is protected. The app can also disable screenshots in its settings, which affects capturing the note through the device’s screenshot feature. Tuisku is focused on encrypted notes and a small set of controls for handling them. The product description identifies the encryption method and notes that sharing is unencrypted; users can choose whether to keep a note within the app or share its contents through another app.
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