Undersky
Effective 10 July 2026
The short version: your birth data never leaves your device. There are no accounts, no tracking, no analytics SDKs, and no ads. The only thing ever transmitted is what you type into the optional "Ask your chart" feature — and we don't store that either.
Undersky has no user accounts and no sign-up. Your name, birth date, birth time, and birthplace are stored only on your device and every chart and numerology calculation happens there. We run no server that holds your profile, so there is nothing for us to lose, sell, or subpoena.
Daily notifications are generated locally on your device. They involve no server at all.
When you send a message in "Ask your chart," that message, recent messages in the same conversation, and a compact summary of your chart (placements and numbers — not your name) are transmitted over an encrypted connection to our relay and forwarded to OpenAI, the AI provider, to generate the reply.
Subscriptions are processed by Apple. We use RevenueCat to check subscription status; it sees the same random per-device ID and Apple's purchase receipt — never your birth data or identity. Apple's own privacy policy governs billing.
Settings → Delete all my data removes everything instantly. Deleting the app does the same. There is no server copy to request or chase — deletion is genuinely one tap.
Undersky is not directed at children under 13 and collects no personal information from anyone.
If this policy changes, the new version will be posted here with a new effective date. Since we hold no contact information, we can't email you — check this page.
Questions about privacy: teri703@gmail.com