Good Lock

Good Lock is a software suite to tweak and customize the user interface and experience on Samsung Galaxy devices. It is developed by Good Lock Labs in cooperation with Samsung, and can be downloaded from the Galaxy Store and the Google Play Store.

Good Lock was first released in April 2016. Responding to customer demand, it was revived in 2018 for the Galaxy S7, S8, S9 and Note 8 lines running Android Oreo. Good Lock has continued to be developed since then. The latest version, Good Lock 6.0, is set to be released alongside One UI 6.0 in Q4 2023.

While it initially launched in South Korea, it has progressively expanded its availability to over 40 countries, with more being added.

Modules
Good Lock uses modules that can be added by users, each of which provides a different sort of customization. Some of the many modules available include:
 * ClockFace, which customizes the clock on the always-on display or lock screen
 * KeysCafe, which customizes the Samsung Keyboard
 * LockStar, which customizes the lock screen
 * One Hand Operation+, which adds a customizable gesture control system
 * Theme Park, which lets users create their own theme
 * Home Up, which customizes the home screen, apps screen and share menu
 * NavStar, which customizes the navigation bar
 * QuickStar, which customizes the quick panel and the top info bar

Reception
The website 9to5Google wrote about the first version of Good Lock: "crazy, complex, and even brilliant in places". SamMobile called it a "balanced effort". XDA Developers wrote about Good Lock in 2018 saying: "Samsung Good Lock genuinely changes a great deal of how the phone's UI looks and feels. This is something that other manufacturers don't allow.". In 2021, Tom's Guide wrote that Good Lock is "the first app you should install on your Samsung Galaxy phone".