Or group reviews by class. That way someone who is saying it's crap on an iPhone5 running iOS7 won't influence the vote of someone who is on an iPhone4 running

Or group reviews by class. That way someone who is saying it's crap on an iPhone5 running iOS7 won't influence the vote of someone who is on an iPhone4 running 6. Same way someone on a 3S won't be able to post "It's too slow" to put off 5 users.