| What it does | Free online calculators, converters, and developer tools that run in your browser
| Free calculators for everyday money, health, and time questions
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| Stage | Startup
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| Founded | 2025
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - 68 free tools across finance, development, and utilities
- Loan repayment and affordability calculators with total interest calculations
- Currency converter with 30 world currencies and live exchange rates
- JSON formatter, validator, and minifier with syntax highlighting
- Date and time tools including age calculator and timezone converter
- Runs entirely in browser with no server uploads
- Works offline after initial page load
| - 38 free calculators for money, health, and time questions
- Mortgage calculator with monthly payment, taxes, insurance, and amortization schedule
- Debt payoff calculator comparing snowball vs avalanche strategies
- Instant results with no loading screens
- Privacy-first: calculations run in browser only
- Support for 150+ currencies
- Printable worksheets for budgets, trackers, and savings challenges
- 55 in-depth guides covering financial and health topics
- Standard published formulas used by lenders and institutions
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| What makes it different | - No account or sign-up required
- Runs entirely client-side in your browser with no data sent to servers
- All tools are completely free with no usage limits
- Works offline after initial page load
- Privacy-first approach with no data collection or transmission
| - No sign-ups, accounts, or downloads required
- Real formulas from lenders and scientific institutions instead of estimates
- Privacy-first: everything runs in browser with no data collection
- Instant results that update as you type
- Clean, clutter-free interface with no ads or noise
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 3 |
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| Citation Flow (Majestic) | 35 | 9 |
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| Referring domains (Majestic) | 6 | 8 |
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TidyCalcs