Storefronts last tested between 2022-08-16 and 2025-09-05. Okcoin - Buy Bitcoin & Crypto was tested in 21 Apple App Store storefronts — available in 20; unavailable in 1 (China mainland).Roughly 1.4 billion people live in the 1 storefront where it is unavailable. App unavailability does not by itself prove censorship.