Fallout Shelter vs I Am Monkey - original game

How do Fallout Shelter and I Am Monkey - original game compare on difficulty, ad pressure, in-app-purchase pressure and what real reviewers say? A side-by-side look, grounded in App Store data.

	Fallout Shelter	I Am Monkey - original game
Genre	Role Playing	Role Playing
Price	Free	Free
Difficulty	medium	easy
Ad intensity	medium	high
In-app-purchase pressure	medium	high
Typical session	variable	short
Rating	4.8 / 5	4.8 / 5
Ratings count	560,577	140,009
Reviews say	What players like Playable offline without internet connection Engaging vault-building and management mechanics Fallout franchise content and TV series character crossovers Common complaints Ads frequently don't award promised rewards after watching Game crashes and freezes on load screen for some players Vault defense AI is unreliable - dwellers ignore raiders and enemies	What players like Funny and entertaining concept Engaging sandbox interactivity with objects Highly replayable with unpredictable visitor behavior Common complaints Excessive ads (5+ per 30 seconds, even after paying for no-ads) Paid ad-removal doesn't work; ads continue after purchase Audio bug that removes sound after ads play

Fallout Shelter — Build and manage your underground vault in this Fallout-themed base-building simulation with exploration, defense, and dweller management. (rated medium difficulty, medium ad pressure) I Am Monkey - original game — Play as a zoo monkey interacting with visitors and objects in a chaotic, humorous sandbox environment. (rated easy difficulty, high ad pressure)

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Data: Apple App Store, as of 2026-07-10. Last updated 2026-07-10.