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Candid Tools vs ReactionTests

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

Candid Tools compared with ReactionTests
DetailCandid Tools logo Candid ToolsReactionTests logo ReactionTests
What it doesFree browser tools for images, PDFs, audio and more that run entirely in your browser Test your visual reaction time for free
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingAll tools are free with no usage limits, no watermarks, and no features reserved for a paid plan. Not given
Key features
  • All processing runs in browser with no file uploads required
  • No account or login required to use any tool
  • 125 different tools covering images, PDFs, audio, video, text and data processing
  • 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
What makes it different
  • Files stay on your device instead of being uploaded to a server
  • Completely free forever with no paid tier or usage limits
  • No account creation or login required
  • Built by one developer focused on utility rather than growth metrics
  • Most tools run entirely client-side with no per-use server costs
  • 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
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)4 no change since last check3 no change since last check
Trust Flow (Majestic)70
Citation Flow (Majestic)2811
Referring domains (Majestic)281

4 details filled in for both companies.

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