When the game came out on Android, I had to give it a try. I installed the game on my Samsung Galaxy Note 10.1 (N1080) and started it.
The game went through a quick tutorial before letting the player do what they want. While the experience was better in the sense that it didn't crash, it was not much different from the other resource-based games like Virtual Villagers. You have to build rooms for the resources (food, electricity, and freshwater). Achievements are a good way to quickly build up your shelter.
I have also bought the Mr. Handy robot to gather resources when I'm offline.
Fallout Shelter gameplay. Vault resources are shown along the top of the screen.
A notification appears when a room produces resources.
Also, there is no peace in your life if you decide to play the game. The game frequently prompts you to return to it. Also, if I'm not on the game, I have a sort of withdrawal symptom where I worry that if I'm not on, my colony would be doom. At the back of my head, I get the nagging feeling is the raider gone for too long and thus is dead? Is my colony starving?
In the end, although the game is "better" than the other open-ended resource-based game in the sense in that you don't have to pay to "win" the game, I decided to free myself from the chain and uninstall the game from the tablet.
As Paul Tassi from Fobes.com said in A Warning To New 'Fallout Shelter' Players On Android, "It’s the dumbest kind of addiction ... . I wouldn’t have anyone else do the same before figuring out what a shallow experience the game really is. One day is enough, and it’s the developer’s fault for not making it any deeper than that."