Problem with Canvas Size from Android to IOS

I was working on a project called Spinner and released it to the play store. So next was releasing it on IOS.

Copyied everything to a new project for IOS. When i clicked the main scene the canvas was way different then when it was on Android.

Android:

IOS:

I tried changing the canvas size to the Android canvas size but the camera wasn't right. So then i tried changing the size of the camera by changing the Width of the viewport Rect but i got something that said "scene is missing a fullscreen camera".

My main question is, How can i change the Canvas Size to what i want so it works with my scene from the Android scene?

Much Help Appreciated