Bethesda’s Fallout Shelter has launched on Android with a free to play with in app purchases business plan just like its iOS counterpart.
All versions of Fallout Shelter will also receive new updates, including servant bot Mr. Handy as a premium reward.
The Bethesda Blog explains it
Have him collect resources inside your Vault, send him into the wasteland to collect loot, and defend your Vault from creatures and disasters, including all new Deathclaw invasions and Molerat infestations,