SATELLITE APP APPENDIX

Yuun

Daily Chinese almanac (黄历) in the HexAstral universe. The free public almanac works without an account. You may save birth info on-device for a deterministic “For you” preview and personalized daily push. Signing in enables optional account sync, cross-device restore, and subscriptions (Yuun Pro).

App-specific data flows

• Birth info: you can save birth details on this device only for a deterministic “For you” summary (吉/平/凶). Deep per-reason explanations remain Yuun Pro. Signing in lets you sync birth to your HexAstral account (with multi-device and cross-app controls) so it can restore on another device, widgets, and Apple Watch.
• Push notifications: if you enable reminders, we register an Expo push token with our servers together with your locale, timezone, display preferences, and optional birth profile so we can send morning/evening almanac notifications even when the app is closed. If a birth profile is on file, notifications may include a short personal conclusion (sign-in not required); Pro may receive additional deterministic tips. You can turn notifications off anytime.
• Home Screen widgets, Lock Screen accessories, and Apple Watch complications show the public 黄历; after you add birth info on device, an optional For you line can appear. Paired Watch sync uses App Group + WatchConnectivity; a signed-in Watch credential may be minted for independent refresh.
• 亲友 (friends & family) you add are stored on device by default. Birthday reminders may also be stored server-side for the registered device when push is enabled. You may export an eligible 亲友 to Yuel as a bond over your shared sign-in.
• Apple / Google sign-in creates a recoverable portfolio identity (stable id, and email when the provider supplies it) required before purchase so subscriptions restore across devices. Purchases are processed via RevenueCat; we never see your card number.
• The optional AI deep reading / timeline / chart chat sends only the minimum chart context needed (for example date, selected 宜/忌 field, day-master stem, or structured chapter inputs) to authorized LLM providers under DPAs — not raw biometrics. Outputs are for entertainment, cultural exploration, and personal reflection only.
• Account deletion in Settings permanently removes account-linked birth sync data, Watch credentials, push registrations linked to your account, device-linked 亲友 reminder rows when tied to your signed-in devices, and related reading/chat history. Cancel App Store subscriptions separately. We may record anonymous install and onboarding steps (no IDFA; no third-party ad SDKs in the app).