When I open my unity app it doesn't go full-screen until I change it in the settings, isn't there a way to do that..(I'm a noob)...it actually isn't a scalling problem or an aspect ratio.... Because you can see how in the phone settings it is turned off Thanks in advance
On Android platform you can use manifest merge trick. According to the question you need fullscreen app, so i can suggest to create your own .aar (android plugin, like jar but can contain resources such as styles) and add your own style. Then you can use it in your unity android manifest.
After created an empty android plugin according to the documentation, we need also create new style in styles.xml.
<style name="Theme.AppCompat.Light.NoActionBar.FullScreen" parent="@style/Theme.AppCompat.Light.NoActionBar"> <item name="android:windowNoTitle">true</item> <item name="android:windowActionBar">false</item> <item name="android:windowFullscreen">true</item> <item name="android:windowContentOverlay">@null</item> </style>
After that you need to mention this theme in your manifest file in Plugins/Android directory of your unity project
or you can use more simplier variant that don't need to resolve dependencies from resolver of app compat library (see)
So in conclusion you need to know android platform and how to create android plugins and connect it in unity project