InstructionsNullify modifies the low level user inputs using the Cocoa Core Graphics API (corresponds to the accessibility functionalities) to directly override the input events.
As a result, the application cannot be sandboxed and distributed via the App Store.
Once you have downloaded it and moved it to your
Applicationsfolder, you will need to launch it, provide the accessiblity permissions it requires, and restart it. You will only need to do this once after the installation.