# VOCA FLOW — Privacy Policy **Effective Date:** 2026-06-04 **App:** VOCA FLOW **Developer:** JaeHoon Jung (HAIB) **Contact:** ux.hoon@gmail.com --- ## Summary VOCA FLOW does not collect, store, or transmit any personal data. Everything you learn — vocabulary progress, settings, audio playback state — stays on your device. ## Data we do not collect - Names, email addresses, profile photos - Learning progress, study history, test results - Audio listening history, sleep timer usage - Device identifiers (IDFA, advertising IDs) - Location, contacts, calendar, photos, microphone - Analytics, crash reports, behavioral tracking ## Authentication (Sign-in) VOCA FLOW supports the following sign-in methods: - **Sign in with Apple** (iOS) — Apple manages authentication. VOCA FLOW receives only an opaque authentication token. Apple may offer to hide your real email; this choice is respected. - **Google Sign-In** (Android) — Google manages authentication. VOCA FLOW receives only an authentication token, never your password. Authentication tokens are stored locally on your device (iOS Keychain / Android EncryptedSharedPreferences). They are used solely to verify your purchase entitlements and unlock downloadable content packs. Authentication providers (Apple, Google) handle their own data per their respective privacy policies. VOCA FLOW receives no profile data from them beyond the auth token. ## In-App Purchases All purchases are processed by Apple App Store (iOS) or Google Play Billing (Android). VOCA FLOW never sees your credit card or payment information. Purchase receipts are stored locally for entitlement verification only. ## Local data storage All learning data is stored locally on your device: - Vocabulary content (bundled with the app or downloaded after purchase) - Your learning progress (known / fuzzy / unknown classification per word) - Your settings (native language, target languages, sequence configuration, image style, voice) - Spaced repetition schedule This data never leaves your device. There is no cloud sync. ## Downloadable content (language packs) When you purchase a language pack, VOCA FLOW downloads static audio files from our content server. These downloads transmit only the language pack identifier; no user-identifying information is sent. ## Children's privacy VOCA FLOW does not knowingly collect data from anyone, including children under 13. If you believe a child has used the app in a way that requires our attention, please contact us. ## Changes to this policy If we ever change what data we collect, we will update this policy and notify users in-app before the change takes effect. ## Contact Questions or concerns about privacy? Email .