Currency converter
Convert to your currency with a live exchange rate, and a rate based on local spending power.
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Main currency
The currency everything converts against. Remembered on this device.
Exchange rates come from open.er-api.com (falling back to frankfurter.app), fetched once and used to work out any currency pair. "Feels like to locals" uses purchasing-power parity instead of the market rate, so it reflects what things actually cost there, not just currency math. Only your main-currency choice is saved, locally.