Why PresuIA exists
PresuIA started from a very specific need: really understanding how money grows (or doesn't) over time, without relying on complicated spreadsheets or generic calculators that don't explain anything. The idea is simple: a clear, free tool that also explains the "why" behind each result, not just the final number.
Who's behind it
PresuIA is an independent project created and maintained by Joel Vidal, based in Tarragona, Spain. There's no large team behind it, no investors — it's a personal project meant to grow slowly and carefully, rather than fast and careless.
What you'll find here
- Compound interest calculator, with scenario comparison and a savings goal mode.
- Quick tools: Spanish VAT, percentages, monthly budget, and net salary.
- Clear guides, without unnecessary jargon, on saving, investing, and taxes in Spain.
Our commitment
All PresuIA tools are and will remain free and sign-up-free. Calculations happen in your own browser — your numbers are never sent to any server or stored anywhere except your own device.
The content is informational and educational. PresuIA is not a financial, tax, or labor advisor, and no result on this site should be taken as personalized advice — for important decisions, always consult a qualified professional.
Contact
Any suggestions, a bug you've spotted, or an idea for a new tool? Write to info@presuia.com. You can also leave your feedback about the site on the reviews page.