VoltReflex vs EZGrader

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

VoltReflex compared with EZGrader
Detail	VoltReflex	EZGrader
What it does	Free online reaction time test that measures your reflex speed in milliseconds	Free grading calculator and printable chart for teachers
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Reaction time measured in milliseconds Sessions of 5, 10 or 20 rounds Best and average score tracking Percentile comparison with online-test benchmarks Shareable score card and friend challenge link Light and dark mode Works on mobile, tablet and desktop No registration or download required Random delay prevents anticipation	Three grading scales (standard, strict, lenient) Printable grading charts Half-point deductions GPA points column CSV export for spreadsheets Up to 200 questions Offline functionality No data collection
What makes it different	No sign-up, download, or account required Does not collect or store personal data Sub-millisecond timer precision using browser performance API Benchmarks against pro gamers, trained athletes, and average adults Fast and clean interface without ads	Instant calculation with no manual math required Privacy-first design with no student data storage Built specifically for teachers' workflow
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	1 no change since last check
Trust Flow (Majestic)	0	1
Citation Flow (Majestic)	12	20
Referring domains (Majestic)	3	4

4 details filled in for both companies.