Not everyone has a IPad, or a Apple device that is above IOS 7-8. I wanted this game ever since I saw it at Bethesda's E3 opening, but I only have a Kindle Fire HD and a IPod 4th gen. If any Bethesda Employee sees this please reply why it is only for Apple devices.

Its being released on android at a later date mate

Update: Source http://kotaku.com/yes-fallout-shelter-is-coming-to-android-1711827482

There are more sources besides Kotaku google is your friend mate