Notesnook Secure Private Notes

Name: Notesnook Secure Private Notes
Author: Streetwriters (Private) Limited

3.4.15

Verified

Streetwriters (Private) Limited

4.58100K+ installs

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Encrypted notes, notebooks and journal. Unlimited notes & devices, no ads.

Notesnook Secure Private Notes: encrypted note taking

By Hafiz Rahman

Editor, tools and utilities

Notes encrypted on your device before they reach the cloud
XChaCha20-Poly1305 and Argon2 encryption that cannot be turned off
Unlimited notes and devices; 50 notebooks and 50 tags on the free plan
Notebook and tag names encrypted along with note contents
Privacy mode that blocks screenshots and app previews
Open source under AGPLv3, including the sync server

What Notesnook is and who it suits

Notesnook is a note app built around encryption. Each note is encrypted on the device it was written on before anything is sent to the cloud, and the developer says it cannot read the notes either. The listing also says there are no ads, trackers or telemetry tied to your notes.

It suits people who keep private or sensitive notes and want them available on a phone, tablet, laptop and browser at the same time. The listing's summary also names a journal alongside notes and notebooks.

How the encryption works and what it covers

The listing names XChaCha20-Poly1305 and Argon2 as the algorithms in use. Encryption covers data on the device, data in transit and data stored on the server. Encryption is always on, and the listing says it cannot be switched off.

The protection also extends to the metadata around your notes. Notebook and tag names are encrypted, not only the text inside each note. Privacy mode blocks screenshots and app previews, so the contents of a note are less likely to appear in a screenshot or in the recent apps view.

Writing and syncing notes across devices

The listing says there is no cap on the number of notes or the number of devices you can sync. Notes sync between a phone, tablet, laptop and browser, so you can continue a note on another device where you left it.

Notes are sorted into notebooks and labeled with tags. On the free plan, the limit is 50 notebooks and 50 tags. The listing gives no other restriction on how notes are organized.

Open source code and running your own sync server

The apps and the sync server are both released under AGPLv3. That means the source code is public and can be read in full. Anyone can also run their own sync server rather than relying on the developer's.

The listing states that Privacy Guides recommends Notesnook.

What's new

Oct 20, 2026

- Minor bug fixes and improvements

Thank you for using Notesnook!

About this APK

The build we hold is Notesnook Secure Private Notes 3.4.15 (APKS split bundle) for Android 7.0 and up.

Version: 3.4.15; 4197425
Requires Android: 7.0+
Target Android: 16

Package ID: com.streetwriters.notesnook
Format: APKS split bundle
Malware scan: Clean on 66 engines
Permissions: 22 declared · 2 sensitive; Camera
Draw over other apps
Signed by: CN=Android, O=Google Inc.
Certificate SHA-256: c10c44cdadb5e3c1dd0f6191bc12f0ca2c7521f2d62a672f4af1cfca9715213e