A developer friend of mine told that if I use getX, I have to use getx's on navigator. So you cannot use flutter's navigator. Same for Clipboard and MediaQuery.

Is it correct? I searched about this topic but did not find any proper answer.

I acutally learn what are the restrictions and the flutter's or custom packages that I cannot use if I use getx

Solution 1: Broccoli_Salad

You can still use Flutter's navigation, clipboard, mediaQuery and everything else, and other custom libraries using GetX. GetX is also a one of custom libraries so there's no any restriction.