| What it does | Paycheck, tax and money calculators with formulas and sources
| Free on-screen ruler and measuring tools with calculators
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | US
| AE
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| Pricing model | Free
| Free
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| Pricing | Not given
| Free tools; RulerNest Pro (ad-free version with saved calibrations) coming soon with no pricing announced yet.
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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
| - On-screen ruler calibrated with bank card to 0.5 mm precision
- Unit converter for length, weight, temperature, area, volume
- BMI calculator with WHO bands
- Loan and EMI calculator with interest schedule
- Printable ruler for A4 and Letter paper
- No data collection or email required
- Offline access via service worker
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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
| - All calculations performed locally with no data sent to servers
- 23 specialized tools all in one place for measuring and everyday calculations
- Works offline and saves preferences locally on your device
- Designed specifically for United States and Canada with Imperial units as default
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | 12 ▲ +2 (up) since last check | Not checked yet ● no change since last check |
| Trust Flow (Majestic) | 7 | 0 |
| Citation Flow (Majestic) | 23 | 0 |
| Referring domains (Majestic) | 14 | 0 |