Privacy policy

The amount you enter is used locally to calculate the visible result and is not included in the rate API request. Hosting infrastructure may process standard technical request data such as IP address, user agent, requested URL, and timestamps for security and reliability.

The website and app do not require an account and do not ask for banking details, card numbers, or identity documents. The iOS app stores preferences and the latest successfully downloaded reference rate on the device so eligible Premium subscribers can use that saved rate offline.

The iOS app uses Firebase Analytics to measure app opens, onboarding, converter and history usage, paywall interactions, purchases, and restores. Firebase may process an app-instance or device-level identifier and product-interaction data for analytics.

The app asks for permission through Apple App Tracking Transparency before accessing the advertising identifier (IDFA). If you allow tracking, Firebase Analytics and RevenueCat may use the IDFA together with app-interaction and subscription-conversion data to measure which marketing campaigns lead to installs and subscriptions. If you decline, the app does not access the IDFA and remains usable. You can change this choice later in iOS Settings > Privacy & Security > Tracking.

Apple processes App Store payments. RevenueCat validates receipts, determines whether Premium is active, and processes purchase history and an app user identifier for app functionality and analytics. When tracking permission is granted, subscription conversions may also be associated with the device advertising identifier for campaign attribution. We do not receive your full payment-card details. Purchases are subject to Apple’s terms and privacy practices.

The website uses Google Analytics 4 to understand visits, page usage, approximate location, device and browser characteristics, and how people find the site. It also uses Google AdSense to connect and, once approved, display advertising. Google and its advertising partners may process identifiers and use cookies or similar technologies for measurement, fraud prevention, ad delivery, and personalization where permitted. The iOS app does not include third-party advertising.

Where required, the website’s consent message provides controls for advertising and analytics technologies. You can also use browser controls or privacy extensions to limit cookies or clear stored data. You can reset the iOS app’s local data by deleting it, manage subscriptions in your App Store account settings, and contact contact@dollartoeuro.app with privacy questions.

Effective 7 September 2026. Material changes will be reflected on this page.