I'm using firebase for my iOS + android app.

I want to remove my iOS app and leave only the android app. (I know its a weird request).
In order to do that I want to block requests to firebase for my iOS app but not from my android app.

So my question is - 
How can I block the request for my iOS app on firebase without destroying my android app. 

Can I use the firebase rules in some manner?

Can I remove my iOS app from firebase somehow?

Thanks