There's been no shortage of controversy over apps Apple has see fit to ban from its App Store.

Now the Cupertino company has sparked outrage over an app it did approve, Manhattan Declaration, that is a "call of Christian conscience" inviting users to take a stand against gay marriage by signing a 4,700-word "declaration" penned by Christian clergy, scholars, and others.

The app fosters "homophobia and extreme anti-choice views," writes Change.org, which blasts the principles spelled out in the declaration for "[boiling] LGBT people down to little more than deviant cretins." PinkNews calls the app "anti-gay." One website created a petition asking Apple to remove the app.

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