| What it does | Instant answers. Zero reloads.
| Free online reaction time test that measures your reflex speed in milliseconds
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Instant real-time calculation with no page reloads
- Unit switching and conversions
- PDF download capability
- Organized categories across 15+ subject areas
- Individual testing and review of every calculator
- Multiple calculation methods for complex formulas
| - 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
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| What makes it different | - Independently developed and maintained by a single professional developer with full transparency
- Uses established, widely accepted, or otherwise appropriate calculation methods from reputable sources
- No-reload instant results for faster problem-solving
- Active user feedback and continuous improvement process
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 20 | 12 |
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| Referring domains (Majestic) | 18 | 3 |
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VoltReflex