| What it does | Paycheck, tax and money calculators with formulas and sources
| 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 | US
| US
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| Pricing model | Free
| Free
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| Pricing | Not given
| Not given
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| Key features | - Paycheck calculators for all 50 states and DC
- Federal income tax and W-4 withholding calculators
- Savings, retirement, credit and loan calculators
- Roth IRA calculator
- CD calculator
- Savings calculator with compound interest
- Mortgage payoff calculator
- Loan payment calculator
- Credit card payoff calculator
- Dividend calculator
| - 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 | - Shows all formulas and cites official sources
- Calculations run entirely in browser without collecting personal data
- Updated annually with current tax year data
- Explains assumptions and provides reproducible examples
- Free with no ads or product sales
| - 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) | 10 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 7 | 0 |
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| Citation Flow (Majestic) | 23 | 12 |
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| Referring domains (Majestic) | 14 | 3 |
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