ReactionTests vs Words from Letters

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 Words from Letters
Detail	ReactionTests	Words from Letters
What it does	Test your visual reaction time for free	Not given
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	Instant live solver that updates with every keystroke Exact anagram mode to use all letters Wildcard support with ?, *, or space as blank tiles Minimum word length filtering Sort results by length, Scrabble score, or alphabetically Over 270,000 English words in dictionary Mobile-first responsive design Curated word lists for high-scoring tiles and letter combinations
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 tracking and your letters never leave your device Fast and clean interface without aggressive ads or lag Dictionary derived from open-source Letterpress word list Supports American and British spellings for popular word games
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 no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	11	0
Referring domains (Majestic)	1	0

3 details filled in for both companies.

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