Privacy policy

Mugjai (“we”) is a bilingual encyclopedia app for Hong Kong. You may browse anonymously. This page describes what we process, where it is stored, and how to delete your account.

Optional onboarding

After first registration you may complete a skippable demographics form: gender, age band, occupation, life stage, and whether you have dependents. All fields are optional; skip and save both mark onboarding complete. We use this only to personalize Ask tone. It is not used for ads or credit scoring. You can update demographics later from Account.

Where data lives

App data (account profile, bookmarks, the content database) is stored in Google Cloud asia-east2 (Hong Kong). Article embeddings (Vertex) run in asia-southeast1 (Singapore). Generative AI for Ask (Gemini Flash) runs on Vertex global. Search sends your query to the Singapore region; Ask sends your question to the global Vertex endpoint. We do not use your content to train public models.

Deleting your account (DELETE /me)

Deleting your account in the app calls CMS DELETE /api/v1/me, which wipes your profile and bookmarks, and asks ADK DELETE /privacy/me to wipe chat sessions and daily Ask-cap rows. The app then deletes your Firebase user. This cannot be undone.

Step-by-step and email support: Delete account.

Identity and push

Sign-in uses Firebase Authentication (Apple, Google, or email). Campaign notifications (for example IRD tax in May and graduation rental in July) are occasional editorial push reminders sent with Firebase Cloud Messaging — not ads or product promos. You can disable them in the app Settings screen, or in system notification settings.

Contact: see the App Store / Play listing.