Zero-Knowledge Offline Encrypted Vault & Note Editor
A 100% offline, zero-permission note taking and encryption studio with client-side Caesar and Base64 cipher utilities, Markdown tools, and secure vaults.
Capabilities
Designed for Reliability & Autonomy
Every feature runs locally on your Android device without requiring internet access or account credentials.
Offline Cipher Utility
Instant client-side Caesar shift and Base64 encoding/decryption engine. Obfuscate sensitive strings and keys in real-time with zero external processing.
Markdown Note Editor
Distraction-free Markdown editor equipped with live formatting, heading shortcuts, bullet checklists, and code block highlighters.
Vault Archive & Trash Bin
Safely archive confidential thoughts or soft-delete obsolete notes with permanent purge controls. No lingering caches or telemetry.
Tag & Category Indexing
Organize notes with lightning-fast local tag indexing and search. Queries execute instantly within device memory without network lag.
Zero Permissions.
Zero Compromises.
Most modern mobile apps request intrusive permissions: Internet access, fine location, contacts, and camera access. CipherNote requests zero permissions.
No <uses-permission> Tags
The Android Manifest declares no permissions. The OS cannot grant network or device access even if an exploit were attempted.
Device Sandbox Isolation
All databases and configurations are held strictly inside Android's protected app sandbox directory.
Permanent Purge on Uninstall
Uninstalling the app instantly wipes 100% of data. No remnants remain on any remote cloud server.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="io.securitylab.ciphernote">
<!-- ZERO <uses-permission> TAGS DECLARED -->
<!-- ZERO NETWORK ACCESS -->
<!-- ZERO CAMERA OR STORAGE ACCESS -->
<application
android:label="CipherNote"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:exported="true">
</activity>
</application>
</manifest>Knowledge Base
Frequently Asked Questions
Does CipherNote require an internet connection?▼
No. CipherNote operates 100% offline. It has no internet permission declared in its manifest, meaning it physically cannot make network requests or reach external servers.
Where is my data stored?▼
All your data, logs, and configurations are saved strictly in your device's private application sandbox. It never touches external cloud storage or telemetry servers.
Are there any subscriptions or hidden paywalls?▼
No. There are zero subscription fees, zero advertising SDKs, and zero locked screens. All features are immediately available upon launching the application.
How can I back up or transfer my data?▼
Because the application has zero network access, backups can be exported locally through the app's built-in export features or managed via standard Android OS device backups.
What happens when I uninstall the app?▼
When you uninstall CipherNote, the Android operating system completely purges the application's sandbox directory, destroying all local records immediately.
Ready to Experience Private, Barrier-Free Software?
Install CipherNote directly onto your Android device. Instant setup, zero logins, and complete peace of mind.