Android users left out in the cold by the announcement (and release!) of Fallout Shelter, you haven't been forgotten. You've just been reminded that for many developers, sadly, you are still second fiddle.
While iOS users play and enjoy the game right now, anyone with a Samsung/LG/HTC/Sony/whatever is going to have to wait a few months.
Yes, we're also working on Fallout Shelter for Android. Hopefully out in a few months.
— BethesdaGameStudios (@BethesdaStudios) June 16, 2015