ChimpTest vs Solitaire Online

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

ChimpTest compared with Solitaire Online
Detail	ChimpTest	Solitaire Online
What it does	A free memory game inspired by Ayumu the chimpanzee at Kyoto University	Play classic Klondike Solitaire online for free in your browser
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	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	Turn 1 and Turn 3 game modes Unlimited hints and undos Full-screen layout No download or registration required Keyboard shortcuts for faster play Works on desktop, tablet and mobile Multiple other solitaire variants available
What makes it different	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	Completely free with no ads or paywalls Clean, fast full-screen interface Play directly in browser on any device Unlimited hints and undos for learning
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)	6 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	6	5
Citation Flow (Majestic)	20	19
Referring domains (Majestic)	3	7

4 details filled in for both companies.