Your data stays with you.
Nothing about you leaves your phone. No accounts, no analytics, no telemetry. Rates come in — nothing about you goes out.
Nothing. No signup, no email, no analytics, no telemetry. Full stop.
All app data — favorite currencies, recent conversions, cached exchange rates, settings — lives in localStorage on your device. Uninstall the app and it's gone.
Rates come from Frankfurter (frankfurter.dev) and exchangerate.host. These providers see requests from your device's IP address like any other API call. We don't proxy or aggregate this.
None used inside the app. The website is hosted on Vercel; visiting the site follows Vercel's standard log retention (they see your IP for the request, no more).
Questions? concurrency-support@dahley.com