Short summary: Good Lock is a free customization suite from Samsung that lets you change how your Galaxy phone looks and behaves — beyond what standard settings let you do. It’s made of small “modules” you can pick and install one-by-one (for things like the lock screen, Quick Panel, navigation, multi-window, and more). If you like to tweak icons, animations, gestures, or the lock screen, Good Lock is one of the best tools for a Samsung device.
What exactly is Good Lock?
Good Lock is not a single big app but a collection of small apps (modules) that plug into Samsung’s One UI. Each module controls one area of the phone — for example, the lock screen, the home screen, notifications, or the keyboard. Because it’s modular, you install only the features you want and can remove the rest easily. This makes Good Lock powerful for users who want simple, focused changes instead of a full system mod.
Popular Good Lock modules you should know about
Below are some widely used modules and what they do in simple words:
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Home Up — Lets you change the home screen layout, animations, and how apps are grouped on your home screen. Great for organizing and making the home screen look unique. (Samsung Global Newsroom)
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QuickStar — Customize the Quick Settings panel (the drop-down tiles) — reorder tiles, change visibility, and tweak brightness controls. (Android Authority)
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LockStar — Deep lock-screen customization: move clock and widgets, change shortcuts, and edit how notifications appear on the lock screen. (Android Authority)
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NavStar — Change navigation gestures, add custom buttons, and adjust how the bottom bar behaves. Useful if you prefer a different navigation style. (Android Authority)
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MultiStar — Improves multi-window and multi-tasking features — better split-screen behavior, floating windows, and extra controls for apps. (Android Central)
There are many other modules for sound, clocks, routines, and even experimental features. Samsung updates modules regularly, so new options appear as One UI evolves. (Samsung Global Newsroom)
How to install Good Lock (simple steps)
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Open the Galaxy Store app on your Samsung phone. Good Lock is distributed mainly through the Galaxy Store. (Galaxy Store)
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Search for “Good Lock” and install the main Good Lock app. Open it once it’s installed. (Samsung au)
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Inside Good Lock you’ll see different sections (like Make Up, Life Up, Clock, Extensions). Browse the list and tap the download icon next to any module you want. That will take you to the Galaxy Store to install that module. (YTECHB)
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After installation, open the module from inside Good Lock and customize settings to your taste.
Note: Availability can vary by country and by phone model / One UI version. If you don’t see Good Lock in your Galaxy Store, it might be region-locked or not yet supported on your phone. There are unofficial workarounds online, but sticking to the official Galaxy Store is safest. (XDA Forums)
Two quick tips to get the most out of Good Lock
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Install one module at a time. Try it for a day, then move to the next. This helps you see what each change does and avoids surprise conflicts. (Android Police)
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Keep modules updated. Samsung and module developers push compatibility and bug fixes frequently (especially after major One UI releases). Check Galaxy Store > Updates regularly. Updates often add features or fix small issues like gesture problems or split-screen bugs. (Android Central)
Pros and cons — in plain language
Pros
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Very flexible: Tweak small parts of the UI exactly the way you like. (Android Authority)
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Official and (mostly) safe: It’s made by Samsung and distributed through Galaxy Store. Safer than random third-party mods. (Galaxy Store)
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Modular design: Install only what you want — this keeps the phone tidy. (Samsung au)
Cons
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Limited to Samsung devices: Good Lock is built for Galaxy phones and won’t work properly on non-Samsung Android phones. (Galaxy Store)
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Compatibility issues: Some modules may not support the latest One UI right away, or certain features might only work on specific models (foldables, for example). Updates are frequent, but you may face small bugs. (Android Central)
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Availability by region: Not every country or store listing shows all modules, so what you can get may vary. (XDA Forums)
Example custom setups you can try
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Minimalist setup: Use Home Up to hide labels, NavStar to set gesture navigation, and LockStar to create a very clean lock screen with only essential notifications. (Samsung Global Newsroom)
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Power-user setup: Install MultiStar for advanced multi-window controls, RegiStar for deep layout customizations, and QuickStar to fine-tune quick settings. Great for productivity and multitasking. (Android Central)
Safety and best practice
Always install Good Lock and its modules from the official Galaxy Store. Avoid APK downloads from unknown sites — unofficial APKs can carry risks. Back up your important data before making many deep UI changes, and if something goes wrong you can remove the module or reset settings. (Galaxy Store)
Final thoughts
Good Lock is a powerful toolkit for people who want their Galaxy phone to feel personal and work exactly how they like. It can be as simple or as deep as you want — from small cosmetic changes to major workflow improvements. If you have a supported Samsung phone and enjoy customizing your device, Good Lock is well worth exploring. Start with one module you really want to change, and then build from there. Happy customizing!
Sources & further reading: Samsung support (Good Lock guide), Samsung Newsroom (Good Lock series), Android Authority, The Verge, AndroidPolice, AndroidCentral.