Client-side encrypted notes that sync across devices.
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.
Licensed under AGPL-3.0-only, by Raphael Nußbaumer BSc.
What's New in v3.6
Imported from the F-Droid repository index.
- block all unneeded domains, bug fixes, disable android auto-backup
Version history
Jun 30, 2026 · 3.7 MB · Android API 21–35 · code 9
Imported from the F-Droid repository index.
- block all unneeded domains, bug fixes, disable android auto-backup
SHA-256 f30c0760de2b9d780bf4d0704391b684779ed0320367d9b25c731529bd3dcfc6
Jun 9, 2026 · 3.7 MB · Android API 21–35 · code 8
Imported from the F-Droid repository index.
- handle opening of external link not supported
SHA-256 67c92dc7e65cde65a8ba9508225a025435840bd9ff7d056911107a756f297b8c
Mar 21, 2026 · 3.7 MB · Android API 21–35 · code 7
Imported from the F-Droid repository index.
- fix registration with hcaptcha
SHA-256 3312481872f31454ca4a1627d5ddf63d79ab92ecfde259fe7c78fa791c56d769
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.ciphernotes.twa is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 3.5 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall ciphernotes first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of ciphernotes, and a listing is removed when the evidence for it stops holding up.
Get ciphernotes
Every source we list for com.ciphernotes.twa is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
f30c0760de2b9d780bf4d0704391b684779ed0320367d9b25c731529bd3dcfc6
Signing certificate
bd027ed7778c6dd60164f0540b4ccdade18f55bf5f6f11451397a4e9007f47cd
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.