In fact, this is a checker based on Selenium WebDriver.
We can say that this is a "universal" checker, since you can use it on any website by simply creating a JSON file containing the login procedures.
The checker itself has a wizard that will guide you through the process of creating this JSON file.
Feel free to experiment. By default, I have already created 3 default settings. They:
Netflix
Pornhub Premium
Spotify Premium
WinRAR - PASSWORD 123