[spacelizard]

Look at the incentives of the people who made Bonzi Buddy and Comet Cursor. That kind of crud and malware will continue to exist as long as spying and advertising are the prevalent business model, which they still are. This isn't going away with a walled garden, in fact the device manufacturers welcome it with open arms.

[r00fus]

So tell me what is the equivalent of Bonzi Buddy on the iOS App Store?

While there are occasional apps that aspire to such, the fact that basic OS functions are private APIs and are not distributable on the only widely available vector into devices prevent malware and many (but not all) privacy breaches.