Storefronts last tested between 2022-12-06 and 2025-10-07. Who is? Brain Teaser & Riddles was tested in 17 Apple App Store storefronts — available in 16; 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.