Sorry about the delay.And no it's not a launcher, it's and add-on to 1ui.
GoodLock, while weirdly named, is just an additional app for Samsung phones. It's made by Samsung and it truly unlocks additional features and customization on your device, but for some reason, it's not installed by default. It's a 'companion' to your phone's system. Once downloaded (through Samsung's store), you have several 'plugins' to choose from and each allows different customization options or additional features for your phone, like having more control over your notification history and its details with the "Nice catch" plug in.Sorry about the delay.
What is it that this app does?
What does it mean when 'Locking' an app.