HanBloom

Privacy Policy

Last updated: September 9, 2026

This policy explains how Kael Tech Lab handles information when you use the HanBloom mobile app.

Summary

HanBloom is an offline-first Chinese learning app. Learning progress, notes, saved words, settings, and review history remain on your device. Optional Google sign-in and Premium features use our server. HanBloom does not show ads or sell personal data.

Information on Your Device

HanBloom stores study progress, review history, daily study statistics, selected vocabulary packs, saved words, notes, settings, and search history locally. This data is not uploaded by the account or subscription service. You can remove it by clearing HanBloom storage or uninstalling the app.

Google Account and Subscription Data

If you sign in, we receive your Google account identifier, email address, and display name to create and secure your HanBloom account. We store hashed session credentials. If you use a Premium subscription, we store the Google Play product, subscription status, expiry and renewal information, and protected purchase references needed to verify access. We do not receive or store your full payment-card details.

Natural Text-to-Speech

If an eligible user selects HanBloom's natural voice, the word or sentence to be spoken and voice settings are sent through our server to the speech provider solely to generate audio. Device or third-party speech and translation actions are governed by the selected provider's own terms and privacy policy.

Anonymous Aggregate Analytics

We keep anonymous aggregate daily counts such as the number of account creations and account deletions, including how many deleted accounts had Premium access. These totals contain no email address, Google identifier, user identifier, purchase token, or other stable identifier, and cannot be used to reconstruct an individual account.

Sharing and Retention

We do not sell personal data or share local study data with advertisers or data brokers. Account and subscription records are retained while needed to provide and secure the service. Service providers such as Google Play, Google identity services, and speech infrastructure process limited data needed for the action you request.

Account and Data Deletion

In HanBloom, open Settings, choose Account, then choose Delete Account. After server confirmation, we permanently remove the account, sign-in sessions, subscription entitlement records, and linked subscription event metadata. We retain only an unlinked deletion receipt and anonymous aggregate counts. Local learning data remains on the device until you clear app storage or uninstall HanBloom.

Deleting a HanBloom account does not cancel a Google Play subscription. Manage or cancel it separately in Google Play. If you cannot use the app, follow the instructions on our account deletion page.

Security and Children

We use access controls, protected session credentials, and limited data collection. No storage or transmission method is completely secure. HanBloom is not directed specifically to children under 13, and we do not knowingly collect their personal information.

Changes and Contact

We may update this policy as HanBloom changes. Questions and privacy requests can be sent to mugen.techlab@gmail.com.