Offline Android privacy tool
Your private fortress for the apps that matter.
Hisn protects selected apps with a PIN or biometric unlock and keeps everything on-device. No ads, no tracking, no cloud dependency.
PIN + biometrics
Lock any app. Stay private.
Built for fast protection with stealth mode, fake crash mode, notification hiding, and intruder detection.
Core protection
Everything needed for practical app privacy
Hisn is designed as a real daily-use app locker, not a cosmetic shell. The shipped feature set focuses on quick access for the owner and friction for everyone else.
PIN and biometric unlock
Secure protected apps with a 4-8 digit PIN and unlock faster with fingerprint or face recognition.
Intruder detection
After repeated wrong PIN attempts, Hisn can capture a front-camera photo and keep it stored locally.
Fake crash disguise
Swap the lock screen for a convincing crash dialog to keep the protection flow hidden from snoopers.
Stealth mode
Hide the launcher icon when needed so the app stays out of sight on a shared or inspected device.
Notification hiding
Block sensitive notification content from protected apps before it appears in plain view.
Adaptive layouts
Built to work cleanly across phones, tablets, and foldables with layouts that scale to larger screens.
How it feels
Fast to set up. Hard to bypass.
- Choose the apps to protect
- Set a PIN hash stored only on-device
- Enable biometrics and delay settings
- Re-lock on screen off or after a grace period
Designed for real devices
Privacy without cloud dependency
Hisn does not depend on analytics, ads, or a remote backend. The app is meant to protect what is already on your phone, using local storage and Android-native capabilities only where needed.
That keeps the experience lightweight, battery-aware, and usable even when the device is offline.
Privacy by design
No ads. No tracking. No internet permission.
The app is built around local-first privacy. Sensitive settings, protected app choices, and intruder photos remain on the device.
Local-only data
Protected app settings and security preferences stay on the device instead of being synced to a server.
PIN stored as a hash
The app stores the PIN as a SHA-256 hash rather than plain text.
No analytics SDKs
There is no analytics, tracking, or crash-reporting dependency built into the shipped app.
Backup disabled for security
Android auto backup is disabled so security data is not silently restored across installs or devices.
Permission clarity
Only the permissions needed for the protection features
Quick answers
What Hisn is built for
Is Hisn an online service?
No. Hisn is a fully offline Android app locker and does not require a backend to protect apps.
Does it work only on phones?
No. The app includes adaptive layouts for phones, tablets, and foldables.
What is the main goal of the app?
To give users practical, local-first protection for sensitive apps without ads, subscriptions, or tracking.