Legal

CertusFX is an information tool. Rates, yields and trend outlooks are daily reference values for orientation — not dealing quotes, not a price at which you can transact, and not financial, investment or tax advice.

Data can be delayed, approximate or wrong, and coverage can change without notice. We make no guarantee of accuracy, completeness or availability. Always confirm the actual rate with your bank, payment or exchange provider before moving money.

Spot rates: European Central Bank daily reference rates via the Frankfurter API (free rail), with extended keyed coverage by ExchangeRate-API (Pro rail). Yields: the FRED® API of the Federal Reserve Bank of St. Louis and US Treasury FiscalData.

This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis. Trend outlooks are model-generated analysis produced inside the app, not market data from these providers.

Your preferences — base currency, language, watchlists and alerts — are stored on your device. Creating an account is optional; if you do, we store your email, an encrypted password, and your Pro status and its expiry date.

We do not sell personal data and we run no advertising or tracking cookies. Our hosting layer keeps minimal technical logs — request paths, device type and timestamps — to diagnose problems. The iOS and Android apps also send crash reports and basic usage statistics to Google Firebase, never with your name, email or account ID.

CertusFX is provided "as is", without warranties. Rates, yields and trend outlooks are informational only, may be delayed or approximate, and are not financial advice.

Pro is sold as one-time timed passes purchased through your app-store account: a pass simply ends when its term is up, and nothing is charged again. The full terms cover purchases, refunds and disclaimers in detail.

CertusFX is built by NestCalc. For support, data requests or anything else, email us — we typically reply within 1-2 business days.