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Numero fetches daily exchange rates from Frankfurter.app, which republishes rates from the European Central Bank. Rates refresh once per day on weekdays. A bundled snapshot ensures conversions work even on first launch or offline.
Make sure you have an internet connection. If rates show as stale, swipe down to refresh. If the issue persists, force-quit and reopen the app. As a fallback, Numero uses a bundled rate snapshot so basic conversions always work.
Check that both devices are signed in to the same iCloud account, that iCloud Drive is enabled, and that Numero is allowed to use iCloud (Settings → your name → iCloud → Apps Using iCloud). Sync may take a minute on a slow network.
Long-press your Home Screen or Lock Screen, tap the "+" button, search "Numero", and choose your preferred widget size. The four-tile converter widget lets you pin specific conversions for one-tap access.
Programmer mode uses unsigned 64-bit integer arithmetic. Bitwise operators (AND, OR, XOR, NOT, shift-left, shift-right) follow standard two's-complement semantics. If you're comparing against a desktop calculator, check the word size and signed/unsigned setting on that calculator.
No. Numero has no analytics, no advertising trackers, and no third-party SDKs. Your calculation history is stored only on your device and syncs through your private iCloud. See the privacy policy for full details.
Email sampathinturi@gmail.com with a description of what you saw and what you expected. Screenshots help a lot. We read every message.
No. Currency rates are sourced from the European Central Bank's daily reference rates and may differ from rates available to retail consumers, banks, or brokers. Numero is intended for everyday reference only.
Email us at sampathinturi@gmail.com. We usually respond within 1-2 business days.
When reporting a bug, please include: your iPhone or iPad model, your iOS version, the Numero version (Settings → About), and a short description of what happened.