The core promise

Fudoki Polyglot is a fully on-device language-learning app. It collects, uploads, and shares none of your personal data. There are no accounts, no analytics, and no third-party tracking SDKs.

Data we do not collect

Fudoki Polyglot collects no data. Specifically, it:

• requires no account or sign-in, and asks for no email, phone number, or identity information;
• integrates no third-party analytics, advertising, or crash-reporting SDKs;
• performs no user tracking (its App Tracking Transparency declaration is "does not track");
• never sends your study content, pasted text, or usage history to any server.

How data is stored on your device

Your learning progress, spaced-repetition (SRS) schedule, streak, chosen language, and daily "X-ray" usage count are stored only in standard local storage (UserDefaults) on your own device, read and written solely by this app. Deleting the app clears this local data. We cannot access and never touch it.

In-app purchases (subscriptions)

The Fudoki Pro subscription is handled through Apple's In-App Purchase (StoreKit). All payment is processed by Apple — we never see or store your payment method, card number, or Apple Account details. We receive only an entitlement status ("active subscriber or not") from Apple, used to unlock Pro features locally on your device. You can manage or cancel anytime in iOS Settings > Apple Account > Subscriptions.

Children's privacy

Fudoki Polyglot collects no data from any user, so it collects no personal information from children, consistent with applicable children's-privacy requirements.

Changes to this policy

If this policy changes, we will update the "Last updated" date at the top of this page. Continued use of the app constitutes acceptance of the updated policy.

Contact

Questions about this privacy policy: maurice_wen@proton.me