Relevant disclosure: I run an iOS developer-related website (http://www.cocoacontrols.com), and I asked Andrew, one of the co-founders, to advertise on my site sometime soon (and I owe him a follow-up email...Andrew, if you see this, sorry I haven't done that yet. I spent the weekend in bed with a seriously bad head and chest cold, and am only now digging myself out of my backlog of work.)
I received a demo of Tapylytics last week, and I have to say it is really impressive. There are definitely some rough edges here and there in the product, but if it holds up half as well as it did in the demo then it'll be the first product I've seen that might actually make people A/B test their iOS apps. It's really cool.
I can't wait to try it out in the real world with an app I've been building on the side for the past few days.
I should also mention that I have a really high bar for accepting ads for Cocoa Controls, and only do it for products that I actually like (reputation takes years to build, and can be pissed away in a second if you screw up badly enough).