Is madden mobile compatible with mobile controllers like Nimbus ?

Hi, @jdrocca 

While controllers can be used, we cannot guarantee compatibility as their software could change at any moment causing the functionality with our game to cease or experience issues.

What I'd recommend doing is reach out to the Community in the Discord and search sources online for those that have used this controller to see what their experiences are like. I know this is not the ideal answer you were looking for, however we do not have a comprehensive list of controllers that will or will not work.