In spite of Apple campaigns to purge dubious titles, the App Store is still affected by large amounts of spam apps, says Marco Arment, the developer of Instapaper. Arment observes that if people search the store for the game Angry Birds, for instance, the results include several poorly-rated guide and cheat apps, which he calls "scams and ripoffs." These also violate name and image trademarks, Arment adds.
