Privacy Policy.

QR Luck does not require user registration or login. The app generates a random installation identifier to establish a background anonymous service session and verify requests securely.

We process scanned or manually entered barcodes and QR code content submitted for lookup, the selected language, device region, and comparison currency, together with necessary platform information, app version, time zone, and service/security logs. These support product lookup, price display, and protection of the service. Device region comes from system settings, not GPS location.

QR codes and barcodes are recognized locally on your phone. Original camera frames and selected photos are not uploaded to our server. Camera and photo access are used for the scanning options you choose; you can manage available permissions in iOS Settings.

Our server may send supported product identifiers, such as barcodes or ISBNs, and necessary query parameters to configured third-party product databases to retrieve product information and offers. Scanned QR code content may also be submitted to our server for lookup. These queries can happen without opening a merchant link.

We do not send your installation identifier, anonymous session token, or stored scan-history list to these product databases. The submitted code or query content itself may contain personal information, so do not submit private or sensitive code content. Providers receive our server's network information for server-to-server queries and handle their requests under their own privacy practices.

When the app downloads a third-party product image, the image provider may receive your IP address, requested image URL, and normal network connection information. Merchant and search webpages open only when you choose their links; those websites may receive the code or search query in the link and operate under their own privacy policies.

Scan history entries, scan times, favorites, available product information, and images are stored on your phone and remain after you close the app. Some offers are temporary and are not saved in persistent history.

Using Delete App in iOS Settings removes the app's local records. Offloading the app is not the same as deleting it: offloading retains documents and data. Copies in device backups are managed through your Apple backup settings and may return if a backup is restored. Removing an individual history entry removes it from active history, but recovery copies and image caches may remain until the app is deleted.

Deleting local records does not erase server-side product catalog caches or service/security records. Service/security records are retained only as reasonably necessary to operate and protect the service or meet legal obligations; you can contact us about access or deletion.

For privacy questions, or to request access to or deletion of relevant information held on our server, contact gan4658690@163.com. If you contact us, we process the message and contact details you provide to handle your request.