Retro Metro vs ChimpTest

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Retro Metro compared with ChimpTest
Detail	Retro Metro	ChimpTest
What it does	Play classic console games in your browser	A free memory game inspired by Ayumu the chimpanzee at Kyoto University
Stage	Not given	Not given
Founded	Not given	Not given
Based in	LK	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Homebrew Collection with free games under open licenses Saves kept on your device No ads and no account required Leaderboards for playable games	Progressive levels that add numbered squares Flash window shrinks as difficulty increases Three-strike game over system Local browser storage of scores Challenge links with shared level difficulty Customizable flash speed via URL parameter
What makes it different	Play your own games - load ROMs from your device No ads, no account, nothing for sale Multiple classic consoles in one browser interface	Based on genuine peer-reviewed research from Kyoto University's 2007 Ayumu experiment No account, no download, no personal data collection Includes detailed educational articles about the original experiment and memory science
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	8 no change since last check	6 no change since last check
Trust Flow (Majestic)	0	6
Citation Flow (Majestic)	21	20
Referring domains (Majestic)	15	3

4 details filled in for both companies.