Tuisku

A simple and lightweight encrypted notes app

New in version 1.2.0

Changelogs:
- CRITICAL: Fix security flaw involving nonce being used twice, please update Tuisku (if you can) if you want to keep your notes secure.

Tuisku is a simple and lightweight notes app that encrypts your notes with the ChaCha20 algorithm stored internally, you can share these notes unencrypted (if you wanted to) using the share button ontop of the note editor.

You can also disable screenshoting in Settings and view your encryption key there.

Author: Omar
License: GNU General Public License v3.0 only
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Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

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Version 1.2.0 (17) suggested Added on Aug 21, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 9.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- com.omaawr.tuisku.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 5.5 MiB PGP Signature | Build Log
Version 1.1.3-1 (15) - Added on Aug 19, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 9.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- com.omaawr.tuisku.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 5.5 MiB PGP Signature | Build Log
Version 1.1.2-1 (13) - Added on Aug 16, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 9.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- com.omaawr.tuisku.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 5.4 MiB PGP Signature | Build Log

Versions

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