Entirely freeze all background activities of apps.
About this app
Android app making it possible to entirely freeze all background activities of any app.
A note to everyone who was supporting SuperFreezZ over the years: SuperFreezZ was my first "real" programming project, and I was incredibly happy about strangers donating to me and translating the app into languages I never heard of, and all the positive feedback I received. My start into the world of free and open source software couldn't have been better.
It is hard to imagine now that back in 2018, when I made my first commit, I barely knew how to program at all. I didn't know where to start, so I just forked an app called "APK Extractor", and started finding out. I learned how to organize a (small) codebase, how to interact with a small-but-supportive community, and how to stay focused when there are lots of nice features that could be implemented.
But the time has come to slowly wind down SuperFreezZ. These days, Android devices make it harder and harder for an app like SuperFreezZ to work properly. Also, Android devices are anyways restricting the amount of time an app is allowed to run in the background, making an app like SuperFreezZ less essential (without giving the user control over it, though). Myself, I am mostly busy working on other projects these days (mainly "Delta Chat" and "Chatmail").
It's not over yet, though! If you have an old and slow phone, or if you like that SuperFreezZ gives you control over which app runs and which does not, then enjoy. And who knows, maybe one day, I will revisit this first project of mine, adding more of the features that were asked for over the years, or maybe someone will fork it.
If SuperFreezZ does not work for you, here are a few alternatives I found on F-Droid (though I can't personally vouch for them):
• "Force Stop Helper": Similar to SuperFreezZ, with less features but still maintained, and you need to press "Force Stop" by yourself
• "Drowser": Uses Root to prevent apps from running in the background
• "Shelter": Allows you to isolate apps (and optionally to keep them from running in the background), but requires some extra storage to work
Thanks again for being part of this!
If you want to try out SuperFreezZ, here you go:
SuperFreezZ
• Get back control over what runs on your phone
• Enhance battery life and reduce mobile data usage by freezing rarely used apps
• Especially useful while you are on a tour, where you need only some apps but a long battery life
Greenify can also do this, but it is not Open Source.
SuperFreezZ is not yet another task manager promising to delete 10 GB of data per month or making your device 2x as fast. This is impossible.
Instead, SuperFreezZ is honest about its disadvantages: Freezing daily used apps probably drains your battery a little faster. Also, these apps will take longer to start when you use them the next time: SuperFreezZ will super freeze your apps, it takes about 1-3 seconds to un-freeze them. Greenify has the same disadvantages, except that the author of Greenify does not warn you about it. So: Just do not overdo it, and SuperFreezZ will be super useful.
Examples for apps that deserve to be frozen:
• Untrusted apps (that you do not want to run in the background)
• Apps you rarely use
• Annoying apps
Features
• Optionally works without accessibility service as this slows down the device
• Can freeze only apps not used for a week (can be configured)
• Choose a white list (freeze all by standard) or a black list (do not freeze anything by standard)
• Can freeze apps when the screen goes off
• Options to freeze system apps and even SuperFreezZ itself
• Completely open source and free software
Licensed under GPL-3.0-or-later.
What's New in v1.1
Imported from the F-Droid repository index.
- - Add a note about winding down SuperFreezZ
- - Update translations
- - Update internal list of F-Droid apps that are not frozen automatically
Version history
Apr 28, 2026 · 2.4 MB · Android API 14–29 · code 1001
Imported from the F-Droid repository index.
- - Add a note about winding down SuperFreezZ
- - Update translations
- - Update internal list of F-Droid apps that are not frozen automatically
SHA-256 09abdca43d35df17040901e3bca6d6f97cb4a90c76845d01c7ab9ab08f44d152
Apr 17, 2023 · 2.4 MB · Android API 14–29 · code 1000
Imported from the F-Droid repository index.
- Update translations
- Remove annoying message that was sometimes shown on startup erreneously
- Fix OxygenOS 12 freezing issue
- Fix fragment_modes_tab
- Remove Crowdin
- Fix "parentNode.getChild(i) must not be null" crash
SHA-256 a810afc11c16a856f5bf90f68b5d35b720a28cbbd22770db0e0298a0db00440c
Sep 22, 2021 · 2.4 MB · Android API 14–29 · code 161
Imported from the F-Droid repository index.
- Fix crash on some devices when trying to enable UsageStats access
- Update translations
SHA-256 819126a10fab2a8f39a2ebeac687fc7da4b10ff8c90e8e494dbea745c866cede
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 superfreeze.tool.android 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, 1.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SuperFreezZ: App stopper 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 SuperFreezZ: App stopper, and a listing is removed when the evidence for it stops holding up.
Get SuperFreezZ: App stopper
Every source we list for superfreeze.tool.android 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
09abdca43d35df17040901e3bca6d6f97cb4a90c76845d01c7ab9ab08f44d152
Signing certificate
0674bbfc6d3c527c189ec0ed5384cb3ff48bc42ddc931900cf51e7a05f25a477
Permissions Required
What each permission lets SuperFreezZ: App stopper 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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