At the "high school" level, Mobicip for iPhone 2.5.7 blocks some very strange things, including a right-wing blog and a newspaper article about union politics. It also fails to block an awful lot of pornography, specifically pornographic photo blogs on tumblr.com. There is no way to report sites for verification. I realize that this is all about "we block whatever our K-12 partners ask us to" and you want me to buy a premium membership to customize my blocks.
But two of my prior comments on this forum have been mysteriously deleted without notice, and you have failed to answer my first question.
So why should I trust you with a further $10 of my money?