ReactionTests vs BlankScreen

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

ReactionTests compared with BlankScreen
Detail	ReactionTests	BlankScreen
What it does	Test your visual reaction time for free	Free fullscreen color screens and display tools 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	Five-round visual reaction test with millisecond timing Seven-round sound reaction time test Local result history with up to 300 sessions stored Consistency measurement showing standard deviation of scores Download score card as image Sound calibration for personal offset adjustment Reference data from published research studies	Fullscreen mode with one click Download backgrounds as PNG in multiple resolutions Works on any device without installation
What makes it different	No account or login required to use the test Results stored locally in browser for privacy Compare full sessions to understand consistency, not just fastest round Research-backed reference data from laboratory studies	No download or signup required, loads in under a second Works as a soft light source for webcam fill light Serves as a professional light table for tracing artwork Detects monitor issues including dead pixels and backlight dimming All tools run in browser with nothing uploaded or stored
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)	3 no change since last check	Not checked yet
Trust Flow (Majestic)	0	7
Citation Flow (Majestic)	11	24
Referring domains (Majestic)	1	22

4 details filled in for both companies.

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