App privacy

HSK Duels for iPhone

Doinel Limited operates the game and is responsible for its account data.
The app uses the same HSK Duels account and learning service as hskduels.com.
When enabled, the iPhone app uses Google AdMob for adverts between completed games on free accounts. Paid and complimentary full-access accounts do not receive these placements.
It does not request microphone, camera, contacts or location access.

Username, display name, password hash, optional verified email address and selected country or region.
Learning progress, answers, duel results, achievements, rewards and chosen profile appearance.
Friend connections, player messages, blocks and reports.
Apple product and transaction identifiers, purchase expiry or revocation, and a random token linking a purchase to your game account. We do not receive your Apple payment-card details.
Notification device tokens and preferences, only when you enable notifications.
Technical request and security information needed to operate the service.

Account, gameplay and purchase information provide the service you request. Security and moderation records protect players and prevent abuse.
Your selected public profile and game rankings are visible to other players. Conversation messages are visible to their participants; reported evidence is available to authorised operators.
The service uses Railway hosting. Enabled account verification and recovery email uses Resend. Apple processes App Store payments and push notifications.
We do not sell your account information.

Cookies and website storage keep you signed in and store game settings and progress.
A bundled HSK 1 vocabulary pack works without a connection. This standalone offline practice does not enter online rankings.
iOS speech synthesis provides offline pronunciation when a Chinese voice is available on your device.

Google may process IP addresses, approximate location inferred from IP, device information, advertising interactions and diagnostic data to deliver, measure and protect adverts.
We request non-personalised adverts, disable Google’s publisher first-party identifier, and do not request permission to access Apple’s advertising identifier.
Where required, Google’s consent form appears before adverts can be requested. You can revisit available choices in Settings or Account, Membership and payments, Ad settings.
We do not send Google your username, learning answers, duel messages or payment details for advertising.
Offline vocabulary does not show adverts.
How Google uses information from apps and Google’s privacy policy explain provider processing, retention and international transfers.

Deletion removes the active account, associated game records and linked purchase records from the game database, then clears the app’s website storage. It cannot be undone.
Apple retains its own transaction records. Subscription cancellation and Apple refund requests are managed through Apple.
For access, correction, privacy enquiries or inability to sign in, contact Doinel Limited using the address below.
Additional website, security-log and privacy-rights information is in the service privacy notice.