I have implemented the retina concept in my mobile app
The image get from the local or image folder
But the App size same for all device (Iphone 5s, iphone 6, etc)
do we need to add the any settings in config.xml files
No, you do not need to add any reference to work with the images that your application contains the www/img or www/images folder, you only need show in the application interface.
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