100 Years - Life Simulator vs Alien Invasion: RPG Idle Space

How do 100 Years - Life Simulator and Alien Invasion: RPG Idle Space compare on difficulty, ad pressure, in-app-purchase pressure and what real reviewers say? A side-by-side look, grounded in App Store data.

	100 Years - Life Simulator	Alien Invasion: RPG Idle Space
Genre	Role Playing	Role Playing
Price	Free	Free
Difficulty	easy	medium
Ad intensity	medium	high
In-app-purchase pressure	medium	high
Typical session	variable	variable
Rating	4.6 / 5	4.8 / 5
Ratings count	175,308	126,173
Reviews say	What players like Choice-driven narrative Multiple life paths to explore Progression across life stages Common complaints Limited information on depth of choices Typical Voodoo ad/IAP model Replayability unclear	What players like Engaging core loop of evolving and devouring enemies Fun for casual play in short bursts (idle mechanics) Solid gameplay concept and entertaining visuals Common complaints Excessive ads that dominate screen and are difficult to exit Extremely long grinding to progress at reasonable pace High IAP pressure with constant monetization offers

100 Years - Life Simulator — Simulate a complete human lifespan making choices from birth to old age in this interactive 3D life story. (rated easy difficulty, medium ad pressure) Alien Invasion: RPG Idle Space — Evolve your alien by devouring humans and defeating bosses in this idle RPG, but prepare for relentless ads and grinding. (rated medium difficulty, high ad pressure)

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