One thing I noticed is that there doesn't seem to be such a thing for mobile browsers yet. Maybe a worthwhile problem to solve? No good idea how to go about it,

One thing I noticed is that there doesn't seem to be such a thing for mobile browsers yet. Maybe a worthwhile problem to solve? No good idea how to go about it, though. Would emulations be sufficient? Or maybe attach some real phones to a server and make screenshots (scaling?)? I am not even sure how many mobile browsers there are. Would one have to test on every phone, or would major versions of webkit mobile, opera mobile etc. be sufficient?