The first to do it properly

There are plenty of plugins but almost all of them switch the image-url when the client is “retina-able”.
This plugin instead adds a src-set with @2 info.
That works like a charm doesn’t require any javascript on the client side and thus doesn’t impact the performance!!

Furthermore you can easily add or create retina pictures in the backend.

Seems like someone really thought about the needs of the users ??