Tabbed Bar Tricks for iOS

Hello,

I am using a Tabbed Page for my main page and added icons for each content page. On Android those icons looks very nice, but same Icons on iOS looks awful.

For those icons, I am using png files. What types of image / icon types are you using and which can you recommend?

What does mean iOS Icons look awful?

Here is it in android:

You can see, icons are white and even other colors are displayed.

How it looks on iOS:

I am using xaml xml to specify the source of those icons.

<ContentPage x:Name="contentPage_ABC" BackgroundColor="White" Icon="MyIcon.png">

Thanks for all tipps !