Full disclosure: I have previously made my feelings known about the lack of in app feedback in Purify, as well as price, amongst other peripheral issues related to said app. My feelings on the matter haven't changed. I did purchase the app a little while ago, because I felt the need to be fair to all testing clients despite whatever personal preference feelings I may have with some of the apps. I wanted to be able to give my fellow forum members an honest review and I felt that I wasn't able to do that, unless I added Purify to the list of apps I have bought and or are beta testing.
For those who have asked what may be the best out of the box app at this moment in time, I have to be honest and say
Purify wins the contest. It has been able to block sponsored ads, as well as handle script and media assignment, without ruining the essence of the webpage or failing to block that which should have been blocked to begin with. I have tested several sites including Macworld, The Verge, CNN, The New York Times, Ebaums World, Kat.cr, The Pirate..., Yahoo, Courier.co.uk, iMore, and several others. The only site thus far that Purify did not have a handle on was the The Pirate... Load times were fast. I did not get the stopwatch out and count and compare to other related apps. I have not noticed any empty white placement boxes. YouTube ads were blocked albeit there was a slight delay with the start of the video because of filtering out ad(s).
If you are looking for an app (at this moment) that you don't have to tweak, is easy to maneuver, are ok with having to hunt down the developer to provide feedback, don't mind paying $3.99, and does a good job of filtering out sponsored ads and the like while offering a few user toggles including Whitelisting, Purify (at this moment) is one that you should look into.
Grade A
In second place is
Crystal. I find the app well designed and easy to maneuver. I also like the ease of the in app feedback ability for reporting sites and offering opinion. I have made a few reports in the last two days and am looking forward to seeing the block list fine tuned. For those who want the Whitelisting feature, Crystal does not currently have the feature, nor does it have user toggle options to fine tune script, media and social content. At the moment, it cannot block sponsored ads nor does it handle media scripting as well as Purify. I ran Crystal through the same website list as Purify and it did not do as good a job in script blocking and media as Purify. At the same time, you may not traverse the same sites as I do. As such, you may not have any problems with Crystal, if you are looking for a load it and forget about it kind of app, and you are willing to be patient as Crystal matures, this may be the app for you. In my opinion, Dean's attitude and work ethic says a lot about him and it shows in his app, in my opinion. While Crystal may not be as strong out of the box (at this moment) as Purify, I see Crystal headed in the same direction. It is just a matter of time. I also think Crystal's pricing is much better than Purify's.
Dean has stated on Twitter, that the Whitelisting option is coming to Crystal, albeit he did not place a concrete timeline on that feature.
Grade B
Since people have been asking about these two apps, I wanted to provide a very brief review of each one, so that some of you could make a better informed decision. Keep in mind, that things could, and probably will change, in regards to the strengths and weaknesses of each app.
I will be commenting on other apps as we go along.