The safest way to get the app is through the Google Play Store , where you can also upgrade to the Pro version officially to unlock features like closing system apps.
You can download from official and verified sources to ensure your device's security. While the specific "build 581" version is older, the latest stable version as of April 2026 is 1.57.9 . Official Download Sources
Improves device performance and reduces CPU usage, which helps in cooling down the phone. The safest way to get the app is
Allows you to select specific apps to keep open while closing others.
Extends battery life by preventing power-draining apps from running in the background. For specific older versions or builds, APKMirror hosts
For specific older versions or builds, APKMirror hosts verified and safe APK files.
Automatically closes background applications with a single touch to free up RAM. For specific older versions or builds
Avoid "Pro Mod" APKs from unverified third-party websites. These modified files can often contain malware or trackers that compromise your privacy. Using the official version from the Play Store is the recommended way to access Pro features safely. Killapps - Close Running Apps - Apps on Google Play
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