| What it does | Measure your reaction time and see where you rank against everyone else on the same device
| Read your screen size, resolution and refresh rate live in your browser
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Reaction time measurement with five trials and median scoring
- Device-specific percentile ranking (mouse, trackpad, touchscreen)
- Exportable score history stored in your browser
- Embeddable tests for third-party websites
- Anonymous population distribution comparison without tracking
| - Live screen resolution detection in CSS and physical pixels
- Device pixel ratio measurement
- Browser window size detection
- Display refresh rate checker
- Color range detection
- Physical screen size measurement with bank card
- TV size calculator by seating distance
- Dead pixel test
- Screen comparison tool at scale
- Refresh rate test
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| What makes it different | - Device-specific rankings that account for hardware differences like screen refresh rate and input latency
- No accounts, no tracking, and no third-party scripts or advertising
- Transparent methodology with published reference data sources and clear limitations
- Fully embeddable tests with no installation or sign-up required
- Median scoring from multiple trials to reduce noise and account for natural variability
| - All measurements run in your browser with no data sent to servers
- Uses bank card calibration to measure actual physical screen size
- Reference data cross-checked against manufacturers' spec sheets
- Distinguishes between diagonal screen size and width/height dimensions
- Shows real panel resolution accounting for display scaling and pixel ratio
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 2 | 3 |
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| Citation Flow (Majestic) | 22 | 4 |
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| Referring domains (Majestic) | 9 | 4 |
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BenchSelf
Screen Dimensions