The linked site hosts a simple test. It shows two images with narrow vertical/horizontal lines. The more they resemble each other, the more Retina your display is.
Posted by Dominik Schöler to makandra dev (2016-06-29 08:02)
The linked site hosts a simple test. It shows two images with narrow vertical/horizontal lines. The more they resemble each other, the more Retina your display is.