pdclarry writes: Apple's iOS 9 now supports ad blockers. The most popular of these, Peace, was withdrawn after only a couple of days because the developer thought "it just doesn't feel good." Crystal then quickly rose to the top of the heap. But the developer of Crystal has announced that it will allow "acceptable ads" — for a fee from the advertiser. Crystal is a paid app; so you can now pay for the privilege of seeing ads.