Legal
Privacy Policy
This policy explains what data The Astro Diary collects, why, who processes it on our behalf, and the choices you have. Plain language, no dark patterns.
Last updated 16 July 2026.
Who we are
The Astro Diary (theastrodiary.com) is a personal astrology app built by Tihomir Videnov under IdeasAllDay. For any privacy question, contact us at the address below — we are the data controller for the information described here.
What we collect
Account data: your email address and a hashed password. Birth data: the date, time, and place you enter to compute your chart (stored so charts are deterministic and cached). Your own content: journal entries, saved people, chat messages, and goals. Usage analytics: pages viewed and key actions (see Analytics below). We do not collect payment card numbers — those go directly to Stripe.
How we use it
To compute your astrological charts and readings, to run the features you use (chat, reports, the daily reading, notifications you opt into), to operate billing, and to understand which features are used so we can improve the app. Your birth data and readings are processed to provide the service to you — not for advertising.
Your journal is private
Journal entries are the most personal thing we store, so they are encrypted at rest (AES-256-GCM) and are never surfaced in any share, export, group, or synastry feature. They are read only when you use a feature that explicitly needs them (for example, tapping the optional 'want a reading?' action), and only for you.
Who processes your data
We use a small set of trusted processors, each only for its stated purpose: PostHog (product analytics), Stripe (payment processing), Amazon SES via a self-hosted email service (transactional and daily emails), OpenStreetMap Nominatim (turning a birth city into coordinates), our own ephemeris service (astronomical calculations), and Anthropic and OpenAI via the Vercel AI Gateway (generating the written readings). We do not sell your data or share it with advertisers.
Analytics
We use PostHog to understand how the app is used — which pages are visited and key actions like sign-up and upgrade. Analytics is cookieless (no tracking cookie, no cross-site tracking) and respects your browser's Do-Not-Track setting. For signed-in users, events are associated with your account so we can measure real usage; we do not use this for advertising.
Cookies
We use a strictly-necessary cookie to keep you signed in (your session). We do not use advertising or cross-site tracking cookies, and our analytics runs without a tracking cookie.
Data retention
We keep your data for as long as your account exists. Deleting your account (Settings → Danger Zone) hard-deletes your charts, chats, profiles, groups, reports, and journal entries.
Your rights
Depending on where you live (including the EU/EEA under GDPR), you have the right to access, correct, export, or delete your data, and to object to certain processing. You can delete everything yourself from Settings, or email us and we will help.
International transfers
Some processors (for example, PostHog and our LLM providers) are based in the United States, so your data may be processed there under standard contractual safeguards.
Changes to this policy
If we make material changes, we will update the date at the top of this page and, where appropriate, notify you in the app or by email.
Contact
Questions about your privacy, or a data request? Email us: hello@ideasallday.com