Samsung’s Good Lock is a powerful, official customization suite that allows Galaxy users to modify nearly every aspect of the One UI interface, from lock screen layouts to advanced camera settings. While many users rely on the standard system settings, this free, modular application—developed by Samsung—provides a level of control typically associated with enthusiast-level custom ROMs, all while remaining fully integrated with the security standards of the official One UI operating system.
The application is compatible with a wide range of devices, including the Galaxy S series starting from the S23, the Galaxy Z Flip 5 and Z Fold 5, and selected models in the Galaxy A series, provided they are running One UI 6 or later. For tablet users, the suite supports the Galaxy Tab S9 and newer models. While Good Lock has been available through the Samsung Galaxy Store for years, it became accessible via the Google Play Store in late 2025, broadening its reach for global users, though some individual modules may still have regional limitations.
Getting Started with Good Lock Modules
Good Lock functions as a central hub where you choose only the modules you need, which helps conserve storage space and keeps your device organized. You can find the app—identifiable by its icon featuring four colored, interlocking jigsaw pieces—in the Galaxy Store or the Google Play Store. Once installed, the interface is divided into four primary categories: “Make up” for visual changes, “Life up” for functional and efficiency tools, “Clock” for display-specific customizations, and “Extensions” for additional add-ons.
Because the app is modular, you do not need to install every feature at once. It is generally recommended to start by selecting two or three modules that address specific needs, such as navigation or lock screen functionality, and downloading them directly within the app’s interface.
Key Modules for Personalization and Efficiency
One of the most popular modules, Theme Park, serves as a gateway to deep visual personalization. It allows users to combine custom icon shapes, colors, fonts, and background images. Since 2026, the module has included an AI-powered theme generator, where users can describe their preferred aesthetic in text, and the AI automatically builds a cohesive color scheme and icon set.
For users who find standard one-handed operation difficult on larger devices like the Galaxy S Ultra or Z Fold, the “One Hand Operation+” module offers six configurable edge gestures—three on each side of the screen. These gestures can be assigned to actions like taking screenshots, toggling the flashlight, or navigating backward, and they work alongside the system’s standard navigation bar.
LockStar provides a WYSIWYG (what you see is what you get) editor for the lock screen, allowing you to reposition the clock, widgets, and app shortcuts in both portrait and landscape modes. This module also enables the placement of app widgets that Samsung does not support by default, such as step counters or weather forecasts, and includes various animated unlock effects like “Swirl,” “Ripple,” and “Mosaic,” which were introduced in 2026.
Power User Features: MultiStar and RegiStar
MultiStar addresses multitasking by allowing any application to run in split-screen or pop-up window mode, even those that do not officially support it. For foldable device users, it provides control over how apps transition between the cover and main screens, including the ability to run any app on the Z Flip cover display. Additionally, it offers enhanced support for Samsung DeX, including higher resolution outputs and the ability to run more than five apps simultaneously.
RegiStar is designed for users who want to push navigation and control further. It introduces a “Backtap” gesture, allowing you to trigger specific functions—like launching the camera or turning on the flashlight—by tapping the back of your phone twice. It also permits the remapping of the side button for double-taps or long presses and allows users to reorganize the One UI settings menu to hide unused sections or prioritize frequently accessed ones.
For those who prefer classic navigation buttons, NavStar allows for total customization of the button layout, order, and color. If you use swipe gestures, NavStar allows you to adjust the sensitivity and active areas for the left and right sides of the screen independently.
Camera and Notification Enhancements
The Camera Assistant module unlocks hidden capabilities, such as the 24-megapixel mode on the Galaxy S26 series, which utilizes AI fusion processing to balance sharpness and file size. It also provides tools like focus peaking in Pro mode for manual focusing, interval burst modes for time-lapse sequences, and automatic HDR detection. Users can also save custom resolution presets to switch between camera settings quickly.
NotiStar addresses the issue of disappearing notifications by maintaining a comprehensive history of all incoming alerts. It includes advanced filtering, allowing you to block notifications from specific apps or set keyword filters—such as “invoice” or “appointment”—to ensure you are only disturbed by what matters. In February 2026, Samsung updated the module with a more robust notification management system to improve visibility across different applications.
Other notable modules include Home Up for launcher customization, Keys Cafe for keyboard effects, QuickStar for status bar management, and Nice Catch, which tracks system logs for notifications and vibrations. As Samsung continues to update One UI, these modules receive periodic improvements, and users are encouraged to check the Good Lock app periodically for new features and compatibility updates.