About Fynzo
Clear tools, transparent methods.
Who maintains Fynzo, how its calculators work, and what their results mean.
Who maintains Fynzo, how its calculators work, and what their results mean.
Fynzo is an independent online project created and maintained by Yasser Chahir in Morocco.
I created Fynzo to make everyday financial, health and general calculations easier to understand. Many online calculators provide a number without clearly explaining how it was calculated or what the result means.
Fynzo aims to offer simple, fast and transparent tools that anyone can use without creating an account.
Fynzo separates calculation logic from explanatory content. Formula inputs, units, edge cases and representative examples are checked before a calculator is published or materially changed.
Finance and health pages identify assumptions, exclusions and limitations. Supporting sources link to public institutions or established standards where appropriate. Content is corrected when a reliable source, calculation test or visitor report shows that an update is needed.
Yasser Chahir is the named editor and site maintainer. Fynzo does not claim professional qualifications that have not been independently verified. The website provides educational information, not personalized professional advice.
Each calculator is tested with sample values and checked against its documented formula. When a tool is updated, its inputs, calculation logic and displayed results are reviewed for consistency.
Reasonable care is taken to keep the tools useful and accurate, but errors can still occur. If you notice an incorrect result or an unclear explanation, please contact us so it can be reviewed.
Fynzo uses commonly accepted mathematical formulas and publicly available reference information. Where applicable, each calculator page explains the formula, assumptions and units used.
Health calculators are general screening and educational tools. Financial calculators provide estimates based on the values entered by the user. They cannot account for every personal, medical, legal, tax or financial circumstance.
All calculators, articles and results on Fynzo are provided for general educational and informational purposes only.
Fynzo does not provide medical, financial, tax or legal advice. A result should not be treated as a diagnosis, a professional recommendation, a loan offer or a guarantee of future outcomes. For important decisions, verify the information and consult a qualified professional.
Most calculations are performed directly in the user's browser, and registration is not required to use the calculators. For more information, read our Privacy Policy.
Questions, corrections and suggestions are welcome. Email chahiryasser12@gmail.com or use the contact form.
Last reviewed: August 1, 2026
Reported errors are reviewed against the page formula, test values and cited source. Substantive corrections update the displayed review date. Cosmetic edits do not receive a misleading freshness date.
Visitors can report a suspected error through the contact page and should include the page URL, expected result and non-sensitive test values.