ciphernotes

Raphael Nußbaumer BSc | Note

5 Downloads 10 Views v3.4 3.67 MB 4.1+

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(3.67 MB)

Editor's Overview

ciphernotes is a note application developed by Raphael Nußbaumer BSc, packaged as a single Android APK of version 3.4 weighing in at 3.67 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 3.67 MB, so it installs quickly even on modest connections.
This build is signed by "Raphael Nußbaumer BSc" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

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.

Key features:
- Open source backend and frontend so you can self-host or review how your data is handled.
- Works completely offline.
- Text and files are encrypted before they're synced.
- No ads, no trackers, no unnecessary cookies.
- No account required for local use.
- Syncs immediately across all platforms.
- Dark- and Light-Mode.
- Todo lists with sub-tasks.
- Import and view images and videos.
- Import files of any type.
- Organize with labels.
- Google Keep import.
- Export notes as JSON.
- Fully keyboard navigatable.
- Keyboard shortcuts, open notes with cmd+k or ctrl+k.
- Text-editor with multi-cursor support and other shortcuts.
- Archive unused notes.
- Share encryption key via QR-Code directly from app to app

Ciphernotes is a PWA hosted on https://ciphernotes.com the Android app bundles the assets and serves them locally using a WebView.

Encryption:
- Encrypted in transit/storage from the server’s perspective. Notes are decrypted locally, edited locally, then encrypted before sync/upload.
- Not encrypted at rest inside the app/device. Local IndexedDB data stores plaintext notes and decrypted file blobs.
- Device compromise exposes notes. Malware, physical device access, malicious extensions (web version), or WebView data extraction can read plaintext local data and the key.
- Server/operator compromise alone should not expose note contents.

Details

Version	v3.4
Size	3.67 MB
Developer	Raphael Nußbaumer BSc
Category	Note
Package	com.ciphernotes.twa
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	5

Frequently Asked Questions

Is ciphernotes free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does ciphernotes require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is ciphernotes safe to install?
We link to the exact APK published by Raphael Nußbaumer BSc. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update ciphernotes?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install ciphernotes

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.ciphernotes.twa.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «ciphernotes» by Raphael Nußbaumer BSc and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.