The app, from Exodus International, offered "freedom from homosexuality through prayer" as its basic tenet. And it outraged gay and lesbian groups (and no doubt many others).
A group called Truth Wins Out started a petition to have the app removed, and that list grew to 146,000, according to pinkpaper.com.
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Apple originally gave the app a 4+ rating, which indicates it had been vetted and showed "no objectionable content."
The petition letter leveraged other civil rights examples and anti-Semitism to further its cause:
Apple doesn't allow racist or anti-semitic apps in its store, yet it gives the green light to an app targeting vulnerable LGBT youth with the message that their sexual orientation is a 'sin that will make your heart sick.'
Apple has yet to comment.