The scoring algo is pretty bad. You get 1 or 2 points for each characters classes and some points for length (at lengths 7, 13, 16 and 21). "AAaa11!!" scores n

The scoring algo is pretty bad. You get 1 or 2 points for each characters classes and some points for length (at lengths 7, 13, 16 and 21). "AAaa11!!" scores nicely using this method (one "blip" from a perfect green bar), but zxcvbn (from Dropbox) gives it a score of "1" with an estimated crack time of 13 minutes.