Good Lock and Galaxy Labs are great official tools for customizing and optimizing Android experience on Samsung devices. Unfortunately, they're only available for download on Galaxy Store in a few selected markets. Even if you have them installed, they may not work at all. Fine Lock is here to solve the problem by acting like a launcher for Good Lock and Galaxy Labs modules. You can download Good Lock and Galaxy Labs modules from APKMirror via the links below.

Some modules may not be installable on your device (J and M series, A10 → A50) due to software limitation. Please contact Samsung Support for more info. I don't develop the modules and Fine Lock cannot intercept their functionalities.

Important: Click here to view all the latest announcements from the developer.

For all Unit modules to work correctly, you need Good Lock installed. You can grab it from here. After installing it, you can hide Good Lock icon from the launcher. I don't know what happens behind the scene but it needs to be that way.

If you need screen recorder on Android 9 and 8, install Nice Shot 1.0.15. On Android 10, Nice Shot is no longer needed.

Note for Android 8 and 9 users: If you have the latest versions of LockStar (, MultiStar (2.5.02), QuickStar ( and Fine Lock still says "There are updates available", please just ignore that and continue using these versions. The latest releases are only made to work on Android 10.

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Click here to learn more about Game Plugins

For more info and tips about Good Lock modules, please visit Android Police or Sammobile (Good Lock) & (Galaxy Labs).

Special thanks to Mr. A.Winarto and yossitarp1 for valuable tips.

So why APKMirror? It's a very trusted third party to provide free pure original APKs. It's maintained by the team at Android Police which is the top news source about Android. Thousands of safe APK downloads are requested from APKMirror everyday. More importantly, APKs there are not restricted by regions, so you can download any free APKs which are not made available in your country, such as some Good Lock modules.

Fine Lock is made for Samsung devices running Samsung's Android Oreo or later. Some modules require Android Pie or later. It does not work and may crash on other models. If you have it installed on a device made by other brands, please uninstall it.

Developed by Yuh Apps