What is flutter driver?

Flutter provides various classes to test user interface of an app. Flutter Driver class is one from the pack that helps to drive the application in another process (read: instrumented app) and exposes different helpful methods to test user interaction and interface of the app.

Prerequisites to use Appium

In general, if you’re running your own Appium server locally, and not sharing it with anyone else, and don’t expose Appium’s port to the wider internet, you should have nothing to worry about, and can safely enable all Appium’s features.