Qardex

PRIVACY POLICY

Your learning is personal. We treat it that way.

This policy explains what information Qardex handles, why it is needed, and the choices available to you.

Last updated August 26, 2026

1. Who we are

Qardex is an AI-assisted flashcard and social study application operated by the individual seller identified in its App Store listing. In this policy, “Qardex,” “we,” “us,” and “our” refer to that operator.

Questions or privacy requests can be sent to support@qardex.app.

2. Information we collect

Account and profile information

When you create an account, we may process your email address, authentication identifiers, display name, username, profile image, biography, learning statistics, and account preferences.

Learning and content information

We process decks, flashcards, study history, confidence responses, race activity, group activity, messages, shared content, and marketplace actions that you choose to create or use.

Files and device permissions

If you choose a related feature, Qardex may access photos, camera input, documents such as PDFs, or notifications. We ask through your device before accessing permission-protected resources. You can change permissions in iOS Settings.

Purchase information

Apple processes payments. Qardex and RevenueCat receive transaction identifiers, product and entitlement status, renewal state, and related subscription information. We do not receive your full card or bank details.

Technical information

We may receive device and app version, operating system, language, approximate region, crash information, notification token, diagnostic events, IP address, and security logs needed to run, protect, and improve the service.

Optional analytics and rewarded-ad information

If you separately opt in to product analytics, Qardex sends a limited set of app-interaction events and your Qardex user identifier to Mixpanel’s EU endpoint. We do not include card, note, file, photo, prompt, answer, email, or message content in those events.

If you affirmatively choose to watch a rewarded ad, Google Mobile Ads may process device or app identifiers, IP address, ad interactions, advertising data, and diagnostic information to deliver, secure, measure, and prevent fraud involving the ad. Qardex requests non-personalized rewarded ads and does not show them automatically.

3. How we use information

  • Provide accounts, sync decks, deliver study sessions, races, groups, messaging, and marketplace features.
  • Generate or regenerate flashcard drafts when you request AI features.
  • Process and restore subscriptions, entitlements, and virtual Race Token balances.
  • Send service notifications and, only where allowed, product communications.
  • Prevent abuse, enforce rules, secure accounts, debug problems, and improve performance.
  • Meet legal obligations and respond to valid rights requests.

4. AI features

When you ask Qardex to create flashcards, the text, image, or document content needed for that request is sent through our server-side systems to an AI service. AI output can be incomplete or wrong. Review generated cards before relying on them, especially for medical, legal, financial, or safety-critical learning.

Do not upload sensitive personal information or content you do not have the right to use.

5. Service providers

We use providers that process information on our behalf or help deliver the app, including:

  • Google Firebase for authentication, databases, file storage, notifications, configuration, hosting, security, and server functions.
  • Google AI services for user-requested flashcard generation through our server-side integration.
  • RevenueCat for purchase status, entitlements, subscription operations, and virtual currency operations.
  • Mixpanel for limited product analytics only after you opt in. Analytics is off by default and can be disabled in Qardex settings.
  • Google Mobile Ads for optional, non-personalized rewarded ads and related consent, delivery, measurement, security, and fraud prevention.
  • Apple for App Store distribution, payments, refunds, and platform services.

These providers may process information in countries other than your own under their contractual and legal safeguards.

6. Sharing and public activity

We do not sell your personal information. Information is shared with service providers as described above, when you intentionally use social or public features, when required by law, to protect rights and safety, or as part of a business reorganization subject to appropriate safeguards.

Your display name, profile image, shared decks, race results, group activity, or marketplace content may be visible to other users depending on the feature and your choices. Avoid posting private information in public or shared areas.

7. Retention and security

We retain information while your account is active and as needed to provide the service, meet legal obligations, resolve disputes, prevent fraud, and keep necessary transaction records. Retention periods vary by data type. Deleted information may remain temporarily in backups or logs before secure removal.

We use technical and organizational safeguards designed to protect information, but no online service can guarantee absolute security.

8. Your choices and rights

Depending on where you live, you may have rights to access, correct, export, delete, restrict, or object to certain processing of your information. You may also withdraw consent where processing relies on consent and complain to your local data protection authority.

  • Product analytics: off by default. Enable or disable it in Profile → Settings → Product analytics.
  • Rewarded ads: optional and opened only after you tap the clearly labelled reward action. Where required, use Profile → Settings → Privacy and ad settings to review or withdraw ad choices.
  • Notifications, photos, and camera: manage system permissions in iOS Settings. Qardex asks only when a related feature needs them.
  • Account deletion: available inside Profile → Settings without contacting support.

You can edit certain profile information in Qardex. To delete your account and associated content, use the in-app account deletion control or contact support@qardex.app. We may verify that the request belongs to you.

9. App Store privacy summary

Depending on the features you use, data linked to your Qardex account can include contact information, identifiers, user content, social and race activity, purchase history, and product interactions. Optional analytics and rewarded-ad interactions are disclosed separately in the App Store privacy label where applicable.

Qardex does not sell personal information. We do not request Apple’s App Tracking Transparency permission or use the advertising identifier in the current release. If our tracking practices change, we will update this policy, the App Store label, and request any permission required before that change takes effect.

10. Children

Qardex is not directed to children under 16, and users must meet the minimum digital-consent age that applies where they live. If you believe a child provided personal information without valid authorization, contact us so we can investigate and delete it where required.

11. Changes to this policy

We may update this policy when the app, providers, or law changes. The current version and its effective date will be posted here. We will provide additional notice when required.