Privacy policy

The company identified under Company information operates Fuyasu and is responsible for your personal information. For privacy requests, contact support@fuyasu.app.

Your learning data

Your profile, study level, preferences, vocabulary, reviews and collections stay on your device. We do not upload your learning library or operate account sync. Dictionary searches work locally; pronunciation uses your device’s speech service.

Exported backups contain your library in an unencrypted file and go only to the destination you choose. Your device, speech and chosen backup services handle information under their own terms.

Purchases

The App Store handles payments. Our purchase-verification provider receives an app-user identifier, transactions, purchase status and device/network request information from the app and store to verify and restore paid access. It does not receive your learning library. We do not receive full payment-card details.

We use purchase information to perform the purchase contract, maintain access, understand sales and meet legal record-keeping obligations. Purchase verification is necessary to provide paid access.

Support and website visits

When you email support, we and our email service provider process your address, message and any attachments to answer your request. Our web-hosting and security providers process IP addresses, requested pages, request times and browser information to deliver and protect this website.

We rely on legitimate interests in answering enquiries, understanding sales and preventing misuse, and on the purchase contract for purchase-related support. We do not add advertising or analytics trackers to this website, collect learning-event analytics, or sell your personal information.

Sharing and international processing

We use the payment, purchase-verification, email, hosting and security services described above. Providers acting on our behalf must protect personal information to the same standard described in this policy. We may also disclose information where legally required.

Providers may process information outside the UK, including in the United States, the European Economic Area and Switzerland. Transfers rely on applicable UK adequacy decisions or approved contractual safeguards, including the UK international-transfer addendum where required. Contact us for details or a copy of the safeguards.

How long information is kept

Your local library remains until replaced, reset or removed with the app, subject to operating-system backups. Reset and restore retain one Previous library recovery copy, replaced by the next reset or restore. Files exported elsewhere remain under your control.

We retain purchase records as needed to provide and restore access and meet legal obligations; support messages as needed to resolve requests, follow-ups and disputes; and website request data as needed to operate and secure the service. Removing the app does not erase those records or cancel billing.

Your rights

Depending on the circumstances, you may request access, correction, erasure, restriction or portability of your personal information. Contact us using the email above; we may need to verify your request. Local backup, export and reset controls remain free.

You can object to processing based on legitimate interests.

You can complain to the UK Information Commissioner’s Office or your local data protection authority. We will update this policy when necessary and give additional notice where required.