Of course, I am fully supportive of freedom of expression and the phrase "I strongly disagree with your opinion but will defend to the death your right to voice it." But...can you imagine an app claiming to "cure" black people? That'd never be approved by Apple. "Curing" LGBT people is just as absurd as "curing" black people. Exposing children to such bigoted, offensive material is really awful. It should almost certainly not have the 4+ rating, and I'm really torn on whether Apple should even allow it into the App Store.
Stuff like this isn't just some abstract issue about 'gay rights' with two equally valid sides of an issue--this homophobia can ruin lives, and sometimes even result in death. It's really a very emotional issue that can't be easily dealt with or abstracted into some 'gay rights' issue.
I feel like I didn't express myself as well as I would've liked, so if anyone has questions, please feel free to ask them.