App Cleaner Site

AppCleaner (by FreeMacSoft) is widely regarded by users on Reddit and MacSales as an essential, lightweight utility for macOS. It solves the problem of "leftover" files—preferences, caches, and support folders—that remain on your system when you simply drag an app to the Trash. Key Features & Workflow

You drop an application onto the AppCleaner window, and it automatically finds all related files scattered across your Library. App Cleaner

It is important to distinguish the original from other similarly named products: AppCleaner (by FreeMacSoft) is widely regarded by users