Alien Invasion: RPG Idle Space vs Gacha Club

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

	Alien Invasion: RPG Idle Space	Gacha Club
Genre	Role Playing	Role Playing
Price	Free	Free
Difficulty	medium	medium
Ad intensity	high	low
In-app-purchase pressure	high	none
Typical session	variable	variable
Rating	4.8 / 5	4.2 / 5
Ratings count	126,173	150,604
Reviews say	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	What players like Extensive character customization with 600+ poses Free-to-play with no IAPs required Creative Studio mode for scene design Common complaints Critical bug: characters delete when exiting/closing app (15+ reviews) Save system fails to preserve character data Version 4.0 update made bugs worse and added ads

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) Gacha Club — Create anime characters and design scenes with 600+ poses and thousands of customization options, then battle over 180 units in story and tower modes. (rated medium difficulty, low ad pressure)

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