Why not Damus?
Discussion
Easily blocked. Amethyst would be more accessible.
But, on the plus side: Next iOS will introduce more appstores besides Apples. So i think it should be harder to block it.
How would an amethyst iOS client be less easily blocked?
My opinion and thought isn’t going to be valid in your case. I just feel a Damus app for android, and an amethyst app for IOS would be a good way to bring choice.