Enforce security policies
About this app
Tiny app to enforce security policies of your device.
It can: * limit the maximum number of failed password attempts * disable USB data connections (Android 12, USB HAL 1.3, Device Owner) * disable safe boot mode (Android 7, Device Owner) * notify on failed password attempt * notify when an app without Internet permission got it after an update
Be aware that the app may not work in safe mode.
Permissions: * DEVICE_ADMIN - limit the maximum number of failed password attempts * DEVICE_OWNER - disable USB data connections * NOTIFICATION_LISTENER - receive lock/package events * QUERY_ALL_PACKAGES - receive all package events
It is Free Open Source Software. License: GPL-3
Licensed under GPL-3.0-only, by lucky.
What's New in v1.1.2
Imported from the F-Droid repository index.
- disable safe boot mode option (Android 7, Device Owner)
- update Russian translation, thanks to Dmitry Grigoryev (icecom), Photon_Gilbert
Version history
Sep 23, 2022 · 4.5 MB · Android API 23–32 · code 9
Imported from the F-Droid repository index.
- disable safe boot mode option (Android 7, Device Owner)
- update Russian translation, thanks to Dmitry Grigoryev (icecom), Photon_Gilbert
SHA-256 10d00df31f37f98560aca4bbe355023cc41a735d88110bf3c529b70cea0bbcce
Aug 23, 2022 · 4.9 MB · Android API 23–32 · code 8
Imported from the F-Droid repository index.
- any failed password attempts
- optional warning
- panickit responder
- add German translation, thanks to Malte Kiefer (@MalteKiefer)
- add Ukrainian translation, thanks to GNCanva
- update Russian translation, thanks to Photon_Gilbert
SHA-256 e32c53a9ffb172a1c6f088c965e7136143d455774ce7cbd076e1f629d52d1218
Jul 24, 2022 · 4.9 MB · Android API 23–32 · code 7
Imported from the F-Droid repository index.
- merge Catcher
- add notify on failed password attempt
SHA-256 a0ad83ba8761cba26a9e7ae3b8cc6cef1b0500e52fff8334b2a6e51cfde07a7c
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
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 me.lucky.sentry 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, 1.1.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Sentry 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 Sentry, and a listing is removed when the evidence for it stops holding up.
Get Sentry
Every source we list for me.lucky.sentry 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
10d00df31f37f98560aca4bbe355023cc41a735d88110bf3c529b70cea0bbcce
Signing certificate
4f8806ae3cc6175643987fda3fc2265157aeff5d72afd0565ea2c992ae8217b2
Permissions Required
What each permission lets Sentry do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
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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