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If you mean Samsung’s Good Lock, it’s a suite of optional apps for customizing a Galaxy phone—not an app that locks or unlocks the device or replaces its screen-lock security settings. Within Good Lock, LockStar is the module for changing the lock screen and Always On Display (AOD). Other modules customize areas such as the home screen, Quick panel and sound controls.
Good Lock and LockStar are different things
Samsung describes Good Lock as a suite of customization apps for Galaxy devices. You install the main Good Lock app, then choose the available modules for the parts of the interface you want to change. LockStar is one of those modules, focused on the lock screen and AOD; it is not the whole Good Lock suite.
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In other words, LockStar changes how the lock screen looks and what appears on it. Samsung’s descriptions focus on customization, not on device protection or replacing the phone’s screen-lock method. For Samsung’s overview, see its Good Lock and its applications explainer.
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LockStar lets users adjust elements of the lock screen and Always On Display, including clock design and size, the position of screen components, stickers and widgets, and lock-screen timeout settings. The available options can depend on the phone model and software version.
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What other Good Lock modules do
Good Lock goes beyond the lock screen. Samsung’s examples include these modules:
| Module | What it customizes | Example features |
|---|---|---|
| LockStar | Lock screen and Always On Display | Clock styles, component placement, widgets, stickers and timeout settings |
| QuickStar | Status bar and Quick panel | Hide status icons, change the panel theme or button grid, and separate the panel’s left and right sides |
| Home Up | Home screen | Samsung highlighted a DIY Home Screen as part of its One UI 7 coverage; that example is not a promise that every device has the same options |
| Sound Assistant | Sound and volume controls | Adjust volume in increments from one to ten |
Samsung reported more than 21 million cumulative Sound Assistant downloads as of early March 2025. That historical figure refers to Sound Assistant, not Good Lock as a whole. See Samsung’s April 2025 feature overview and its One UI 7 Home Up coverage.
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How to get Good Lock and its modules
- Open the Galaxy Store on your Samsung Galaxy phone and search for Good Lock.
- Install Good Lock, then open it to see the modules offered for your device.
- Choose a module, install it from within Good Lock, and open it to adjust its available settings.
- Return to Good Lock to check for module updates.
The Galaxy Store listing describes Good Lock as free and lists Samsung devices running Android 8.0 or higher, while warning that some devices may not be supported. That listing’s version and date can change; check the current Good Lock Galaxy Store page for the listing details available to you.
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Why Good Lock may look different on your Galaxy
Samsung cautions that features and settings vary by software version and phone model. A module or option shown in a guide may not appear on your phone. Check both the Galaxy Store listing and the modules shown inside Good Lock on your own device before assuming a feature is supported.
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