Human Benchmark vs Spider Solitaire

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

Human Benchmark compared with Spider Solitaire
Detail	Human Benchmark	Spider Solitaire
What it does	Free cognitive tests to measure and improve your mental abilities	Free online card game with no download or account required
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	Reaction Time Test - measure response to visual stimuli Visual processing tests including Visual Memory, Symbol Search, and Color Blindness Score tracking and comparison to other users Leaderboard functionality Aim Trainer test Color Hue Test for color distinction FPS Reaction training including Gridshot, Flick, and Tracking	1, 2 and 4 suit difficulty levels Touch and mouse controls Keyboard shortcuts
What makes it different	No signup required - tests available immediately without account creation Tests based on established research protocols rather than casual games Scores stored locally in browser with no personal data tracking or sale Accessible cognitive testing without requiring lab or academic credentials	No download or account required to play Works on any device with a modern web browser Game progress saved automatically in browser Unlimited undo to explore strategies risk-free Multiple difficulty levels for all skill levels
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)	14 no change since last check	14 +13 (up) since last check
Trust Flow (Majestic)	8	0
Citation Flow (Majestic)	24	10
Referring domains (Majestic)	35	3

4 details filled in for both companies.

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