Currency DJ

Legal

Currency DJ - Privacy Policy

Last updated: May 25, 2026

Currency DJ (the "App") is a currency conversion application developed by emonster, inc. ("we", "our", or "us"). This Privacy Policy explains how information is handled when you use the App.

Currency DJ is designed to work without accounts or direct personal profile information. The App uses a scrub wheel, exact amount entry, currency pickers, local preferences, cached exchange-rate snapshots, and limited diagnostics and analytics to help estimate currency conversions and improve the App.

1. Information We Do Not Collect

Currency DJ does not require an account and does not ask for your name, email address, phone number, contacts, or Apple ID.

Currency DJ does not use advertising SDKs, Mixpanel, account-based tracking, or advertising identifiers for tracking across apps or websites.

2. Amount Entry and Currency Conversion

Amounts are entered manually through the scrub wheel or exact amount sheet.

Manual amounts, selected currencies, favorites, and conversion results are processed locally in the App. They are not uploaded to emonster servers and are not sent with exchange-rate requests.

3. Locale-Derived Defaults

Currency DJ may use your device locale and region settings to choose initial currency defaults and favorite currencies. The App does not request location permission and does not send your location to emonster servers.

4. Local App Data

Currency DJ may store limited local data on your device, including:

  • Selected source currency;
  • Selected target currency;
  • Favorite currencies;
  • Appearance, haptic, magnetic amount, and compact-number preferences;
  • Related-app promotion display timestamps;
  • A random, pseudonymous installation identifier used for diagnostics and analytics correlation;
  • Optionally, the last source amount;
  • Cached exchange-rate snapshots used for offline conversion.

Most local app data stays on your device unless you choose to share it through system features outside the App. The pseudonymous installation identifier and limited app context described below may be sent to Firebase Analytics and Firebase Crashlytics.

5. Exchange Rate Requests

When you refresh exchange rates or when the App needs a rate that is not cached, Currency DJ may request exchange-rate data from Frankfurter or another configured exchange-rate provider. These requests generally include the base currency, requested quote currencies, and standard network metadata that a server receives for internet requests, such as IP address, request time, and basic technical connection information.

Currency DJ does not send manual amounts, favorite currencies, local preferences, or conversion results with exchange-rate requests.

Exchange-rate snapshots are cached locally so the App can continue converting amounts offline after rates have been downloaded.

6. Related App Promotions

Currency DJ may show a local, dismissible promotion for another emonster app. To avoid showing a prompt for an app already installed on your device, Currency DJ may check whether that related app can open through its URL scheme. This check happens locally and is not sent to emonster servers.

7. Analytics and Crash Diagnostics

Currency DJ uses Firebase Analytics and Firebase Crashlytics, services provided by Google, to understand app usage, measure purchase and onboarding flows, diagnose crashes and non-fatal errors, and improve reliability.

Analytics events may include app version, build number, platform, device family, country or region derived from device locale, returning-user status, onboarding and paywall actions, purchase and restore outcomes, subscription plan identifiers, currency codes, favorite-currency counts, remaining free-conversion counts, and related-app link taps. Currency DJ does not send manually entered amounts or conversion results in analytics events.

Crash diagnostics may include crash reports, stack traces, operating system version, device model or family, app state, app version, build number, pseudonymous installation identifier, breadcrumbs of recent in-app actions, and developer-defined diagnostic keys. Crash reports are used to identify, prioritize, and fix stability issues.

Firebase may automatically generate or process identifiers and technical metadata needed to provide Analytics and Crashlytics. We do not use Firebase data to track you across third-party apps or websites, and we do not sell personal data.

8. Support Emails

If you choose to contact us from the App or by email, we receive the information you decide to send. A support email may include your message and optional app or device details included in the email template, such as app version, iOS version, device model, locale, region, and language. We use this information to respond to your request and troubleshoot the issue you report.

9. How We Use Information

We use the limited information described above to:

  • Operate the App;
  • Provide approximate currency conversions;
  • Cache exchange rates for offline use;
  • Measure onboarding, paywall, purchase, restore, conversion-limit, and related-app promotion performance;
  • Diagnose crashes, non-fatal errors, and reliability issues;
  • Respond to support, privacy, or legal requests;
  • Comply with applicable law and protect our rights.

We do not sell personal data, create advertising profiles, or track your activity across other apps or websites for marketing.

10. How Information Is Shared

Currency DJ shares only the limited information needed for the functions you use:

  • Exchange-rate provider: rate refresh requests are sent to the configured rate provider, currently Frankfurter.
  • Firebase / Google: app analytics, crash diagnostics, and related technical metadata are processed by Firebase Analytics and Firebase Crashlytics to help us understand app usage and fix reliability issues.
  • Email providers: if you email us, your email is handled by the email systems used to send and receive that message.
  • Apple: Apple may process information related to App Store distribution, iOS permissions, and device operation under Apple's own terms and privacy policies.
  • Legal requirements: we may disclose information if required by law, court order, or valid governmental request.

11. Data Retention

Local preferences and cached exchange-rate snapshots remain on your device until you change settings, clear app data through system mechanisms, or uninstall the App. The pseudonymous installation identifier is stored in the device Keychain and may remain available after reinstall unless removed by system behavior or device reset. Firebase Analytics and Crashlytics data is retained according to our Firebase settings and Google's applicable terms. Support emails and related correspondence may be retained as needed to respond to your request, maintain business records, resolve disputes, or comply with legal obligations.

12. Your Choices and Controls

  • Offline use: You can use cached exchange rates offline after they have been downloaded.
  • Support emails: You decide whether to contact us and what to include in your message.
  • Uninstalling: You can delete the App to remove its local app data from your device, subject to iOS behavior and backups.
  • Privacy requests: You can contact us at privacy@emonster.com. Because Currency DJ does not require accounts, we may need information from you to locate records associated with a particular app installation or support request.

13. Cookies and Similar Technologies

Currency DJ is a native iOS app and does not use browser cookies inside the App. Firebase Analytics may use app-instance identifiers or similar app analytics technologies. Currency DJ does not use advertising identifiers for tracking across apps or websites.

14. Children's Privacy

Currency DJ is intended for a general audience and does not knowingly collect personal information from children under the age of 13, or the minimum age required in your country. If you believe a child has provided personal information to us, contact us at privacy@emonster.com.

15. Security

We use reasonable technical and organizational measures to protect information handled in connection with the App. No method of transmission or electronic storage is completely secure, so we cannot guarantee absolute security.

16. International Data Transfers

Exchange-rate requests, Firebase Analytics and Crashlytics data, and support emails may be processed in countries other than where you live, including the United States or countries where our service providers operate. Those countries may have different data protection laws than your country.

17. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. When we do, we will revise the "Last updated" date above. Continued use of the App after an update means you accept the revised Privacy Policy.

18. Contact Us

If you have questions, comments, or requests about this Privacy Policy or our data practices, contact us at:

19. Attributions

Currency DJ may use the following tools, frameworks, services, or libraries:

  • Apple SwiftUI, Foundation, and UIKit
    Used to build the native iOS app experience.
  • Frankfurter
    Used as an exchange-rate data provider.
  • Firebase Analytics and Firebase Crashlytics
    Used for app analytics, crash reporting, non-fatal error diagnostics, and reliability monitoring.
  • SFSafeSymbols
    Used as a development-time library under the MIT License.