Privacy-focused notification masking for screen sharing and presentations
About this app
KyuubiMask is designed to keep your notification content away from prying eyes. It replaces notification text as quickly as possible, making it much harder for others to read what you received—even if they're looking right at your screen. Notification content is never displayed or saved by this app.
KyuubiMask is a privacy-first notification masking tool that protects your sensitive information during screen sharing, presentations, or when your screen is visible to others.
🔒 PRIVACY FIRST • No internet permission - works completely offline • No data collection or storage • No tracking, analytics, or ads • Notification content is never logged or saved • Open source with Apache 2.0 license
✨ FEATURES • Masks notifications from any app you choose with generic text • Tapping a masked notification opens the original app directly, without revealing any content • Built-in presets for Slack, Discord, WhatsApp, and LINE • Per-app toggle to choose which apps to mask • Quick Settings tile for one-tap masking toggle • Simple on/off toggle to enable or disable the service • Works in the background • Minimal permissions required • Lightweight and efficient
📱 SUPPORTED APPS KyuubiMask works with any installed app — select additional targets via the "Add custom apps…" button in Settings. Slack, Discord, WhatsApp, and LINE are available as built-in presets.
🎯 PERFECT FOR • Screen sharing during video calls • Live presentations and demos • Recording tutorials or videos • Working in public spaces • Protecting your privacy
💡 HOW IT WORKS When enabled, KyuubiMask replaces notification content from supported apps with generic text like "New notification", hiding sensitive information while still allowing you to see that you received a notification.
📖 WANT TO CHECK A NOTIFICATION LATER? This app never saves notification content. If you want to review what you received, on supported devices (Android 11+), you can use Android's built-in Notification History if available and enabled (Settings → Notifications → Notification History).
🦊 OPEN SOURCE All code is available on GitHub. No hidden functionality, complete transparency.
Licensed under Apache-2.0, by soraiyu.
What's New in v1.7.12
Imported from the F-Droid repository index.
- • Notification masking service now recovers automatically when it gets stuck, without requiring a device reboot
Version history
Apr 10, 2026 · 2.5 MB · Android API 26–35 · code 24
Imported from the F-Droid repository index.
- • Notification masking service now recovers automatically when it gets stuck, without requiring a device reboot
SHA-256 32011764521006040b92404b8e36a4fc3ae2da9253550815cdda11493d2b213b
Apr 7, 2026 · 2.5 MB · Android API 26–35 · code 23
Imported from the F-Droid repository index.
- • Added "Support development ♥" donation link to Settings — opens GitHub Sponsors page (Liberapay, Ko-fi, and Buy Me a Coffee)
SHA-256 d8253800e11bb20cb64c0edfc5f25c2eeffae671c1c0a846f76d63b0e97d15db
Mar 28, 2026 · 2.5 MB · Android API 26–35 · code 22
Imported from the F-Droid repository index.
- • Fixed: masking service now automatically reconnects after being stopped by the system — no device restart needed
- • Added app store icon for F-Droid and other distribution channels
SHA-256 12ce992df8d7ad2c726ca85eaf75fe610b985c453906b56b104ed9da4db3b3ed
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.rtneg.kyuubimask 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, 1.7.11 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall KyuubiMask - Privacy First 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 KyuubiMask - Privacy First, and a listing is removed when the evidence for it stops holding up.
Get KyuubiMask - Privacy First
Every source we list for com.rtneg.kyuubimask 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
32011764521006040b92404b8e36a4fc3ae2da9253550815cdda11493d2b213b
Signing certificate
5ecd865b4a5f0e4ff7bb8e83c484993a22f2780972d7f2cd2a80ad25a102e620
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.
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