Adblock Fast was one of the first adblocking apps to utilize Samsung's browser's native ad block support. It was promptly removed from the Google Play Store as soon as it was published. The reason Google gave was that it was an app that had an effect on another app.
Rocketfish appealed Google's decision, and Google changed their mind reversing the ban. Along with republishing the app to the Play Store rocketfish added support for Android 4.0.
The app is intended to speed up your browsing experience by eliminating crazy data consuming popup ads. The only drawback is that it also blocks non malicious ads meaning creators take a hit on the ad revenue they need to keep creating.
via Rocketfish
