As announced earlier this month, Bethesda's free-to-play mobile hit Fallout Shelter is coming to Android in August. No specific release date was given back then, but Bethesda revealed it at a Fallout panel at QuakeCon today. The game will be released on August 13th, along with several new features in an update that also will be available for iOS users at the same day.
The update will add new enemies, like the well-known and feared Deathclaw, and the not so scary Molerats. As a premium reward, Vault Dwellers will be able to utilize Mr. Handy, a robotic servant that will loot the wasteland for you, collect your Vault resources or even defend your Vault from enemies.
Source: Bethesda Blog