Locks your phone when you fall asleep watching videos. No ads, open source.
About this app
Do you often fall asleep while watching videos or listening to music on your phone? SleepGuard makes sure your device doesn't keep running all night long.
At an interval you choose, a small red circle appears on top of whatever you are watching. Tap it and playback continues as normal. Don't tap it within a few seconds - because you have fallen asleep - and SleepGuard locks the screen, just like pressing the power button. Your video stops and your phone is protected for the rest of the night.
There is also an Audio mode for music, audiobooks and podcasts: instead of a button, SleepGuard works as a simple sleep timer that stops playback after your chosen interval — even with the screen off.
WHY YOU NEED IT
* YouTube and other apps with autoplay: Without SleepGuard, one video starts the next and the next and the next ... until morning. In the worst case the battery is drained empty and your alarm can no longer go off when you need it. SleepGuard stops the chain as soon as you stop responding.
* Netflix, Prime Video and other streaming apps: Fall asleep mid-episode and you wake up not knowing where you dozed off. You waste time scrubbing back to find the spot - sometimes sitting through long ads again and again. SleepGuard locks the screen right when you don't respond, so your streaming app knows where to continue.
HOW IT WORKS
1. Set how often the check button should appear (e.g. every 5 minutes). 2. Set how many seconds you have to react before the screen locks (e.g. 30 seconds). 3. Choose where on the screen the button appears. 4. Start SleepGuard and keep watching.
FEATURES
* Two modes: Video (wake-check button over any app) and Audio (sleep timer for music, audiobooks and podcasts, works also with the screen off) * Adjustable interval and reaction time * Eight button positions to choose from * Reliable timing even in the background (uses the system alarm) * 29 interface languages: all 24 official EU languages plus Russian, Japanese, Chinese (Simplified & Traditional) and Turkish * Completely free, no ads, no tracking, no accounts
PRIVACY
SleepGuard has NO internet permission at all. It cannot send or receive any data. It does exactly two things: show a button and lock the screen. It collects nothing.
PERMISSIONS EXPLAINED
* Display over other apps: to show the red circle on top of your video. * Device admin (screen lock only): to lock the screen like the power button. * Foreground service & exact alarm: to make the check button appear on time. * Ignore battery optimization (optional): so the button still works reliably while another app is in the foreground. * Notifications (Android 13+): to show the ongoing "SleepGuard is active" notification.
OPEN SOURCE
SleepGuard is free software, licensed under the GNU General Public License v3. The full source code is available so anyone can inspect exactly what the app does: https://github.com/OlafDrechsler/SleepGuard
SUPPORT
SleepGuard is free and will stay free. If it helps you, you can support it's developer with a voluntary donation from within the app. There is deliberately no reward in return - it is simply a thank-you.
Licensed under GPL-3.0-or-later, by Olaf Drechsler.
What's New in v1.4.2
Imported from the F-Droid repository index.
- * The Interval and Timeout settings now show a short inline explanation of what they do, so it's clearer at a glance
Version history
Jul 15, 2026 · 11.1 MB · Android API 26–35 · code 8
Imported from the F-Droid repository index.
- * The Interval and Timeout settings now show a short inline explanation of what they do, so it's clearer at a glance
SHA-256 097a648f73806a7232077f6358bfb78f5182191cfcb322ed42e628ff23232da7
Jul 14, 2026 · 11.1 MB · Android API 26–35 · code 7
Imported from the F-Droid repository index.
- * Professionally refined translations (via DeepL) for 18 of the newer languages, for more natural wording
- * Fixed a few wording and consistency issues in several languages
SHA-256 beebeed8047096f480b059e0edd5009dfa5b19e7910dfd7b836d45685aae1c35
Jul 13, 2026 · 11 MB · Android API 26–35 · code 5
Imported from the F-Droid repository index.
- * New: Audio mode — a sleep timer for music, audiobooks and podcasts that stops playback after the interval, even with the screen off
- * Choose Video or Audio mode; a matching explanation is shown in the app and during the guided setup
SHA-256 b752fa74dfe43d179fb4994d1be4a36148b438d62a06dcef007956a3a3a6ad85
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- 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.sleepguard 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, 1.4.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SleepGuard 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 SleepGuard, and a listing is removed when the evidence for it stops holding up.
Get SleepGuard
Every source we list for com.sleepguard 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
097a648f73806a7232077f6358bfb78f5182191cfcb322ed42e628ff23232da7
Signing certificate
937eb89c4fc4356477d6cf6953a31b772408482c8702fbca467b5858d8867b01
Permissions Required
What each permission lets SleepGuard 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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