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ReactionTests vs White Screens

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 White Screens
DetailReactionTests logo ReactionTestsWhite Screens logo White Screens
What it doesTest your visual reaction time for free Full-screen white light in your browser
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingNot 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
  • Full-screen white light display
  • Adjustable color temperature from 2,000 K to 9,000 K
  • Brightness control
  • Timer functionality
  • Keep screen on to prevent dimming
  • Dead pixel test with five colors
  • Refresh rate testing
  • Keyboard shortcuts for quick access
  • Multiple color options
  • Download images in multiple resolutions
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
  • Runs entirely in browser with no app or sign-up required
  • Works on iPhone and Android when added to home screen
  • Completely free with no paid plans or subscriptions
  • Customizable warmth and brightness for different uses
  • Multiple screen test and diagnostic tools included
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)3 no change since last check1 no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)110
Referring domains (Majestic)10

4 details filled in for both companies.

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