On of the features I really like about K9 is that you can report a site for recategorization (on the computer version, although not the iPhone version). I can't see any way to do that with Mobicip. I have found that there are an awful lot of blogs on the tumblr site that are straight out porn. I was able to get to one of those sites this morning, so I went looking for a way to report it and I couldn't find one. I also found, checking the links of "blogs that follow this one", all of which were also pron, some of them were blocked but some were not. I realize that I could block all of tumblr with a blacklist if I bought the premium subscription, or I could block individual ones as I found them, but there ought to be a way to report outright porn that your filter misses.