Privacy Policy
This Privacy Policy was updated on 2026-07-25.
Scope
This policy covers destinyslip.fundalux.io, free web practice, demand waitlists, and services for Destiny Slip and Chūyáo.
Information we collect
The site has no sign-in. Free practice records an anonymous session ID, question events, language, coarse referrer category and UTM values; it does not create formal learning progress. Waitlists collect email, demand type and attribution only when you submit them. We may process IP addresses to prevent abuse, but do not store the raw IP in practice records.
App data
Destiny Slip chart, profile and case data is encrypted on-device with SQLCipher. The site does not collect complete birth data. Account and formal learning data in each app is handled according to its in-app functionality and notices.
Use and retention
We use data to provide the service, prevent abuse, diagnose failures and validate demand in aggregate. Raw web-practice events are retained for up to 90 days. Anonymous daily aggregates and waitlist records are retained for up to 24 months, then deleted or irreversibly anonymized.
Your choices
A withdrawal identifier is issued when a waitlist entry succeeds. Account deletion and data-copy requests begin inside a signed-in app; email us if you cannot access the app.
Providers and security
We may use Cloudflare for hosting, security and storage (a global edge network based primarily in the United States), and Resend to deliver double opt-in confirmation emails and forward private support requests. In-app functionality may use Firebase (Google, for sign-in, Analytics and Crashlytics, with data processed primarily on Google infrastructure in the United States), RevenueCat (for subscription and purchase management, with data processed primarily on AWS infrastructure in the United States), and AdMob (Google, for ad delivery, with data processed primarily on Google infrastructure in the United States and used for global ad delivery). These providers may transfer data outside Taiwan. Data is transported over HTTPS and access follows least-privilege controls. No system can guarantee absolute security.
Contact
Email [email protected] with privacy questions. Material changes will be reflected by updating this page and its date.