How do the rates and outlooks work?

Spot rates come from the European Central Bank’s daily reference feed, with extended keyed coverage on the Pro rail; yields come from official government sources; and the AI trend outlooks are computed nightly from that same data. The full detail is on our Methodology page.

Is CertusFX really free?

Yes — the converter, the majors boards, charts and personalization are free, no account needed. Pro unlocks 160+ currencies, the yields dashboard, AI trends, alerts and exports.

How do Pro passes work?

A pass is a one-time purchase in the iOS or Android app: it grants Pro for a fixed period and simply ends when the term is up — nothing continues and nothing is charged again. Buying another pass while one is active extends your remaining time.

How do I delete my account and data?

Email support@nestcalc.ai from your account email and we will delete your account and personal data within 30 days. The full steps are on our Delete data page.

What data do you collect?

Only what is needed — an email and encrypted password if you create an optional account, and your plan status if you buy a pass. Preferences and watchlists stay on your device. We do not sell your data. See our Privacy Policy.