Zvezdana, AI Web App
A subscription astrology platform, designed, built, and run end to end. Real astronomy, AI readings, billing.
Zvezdana
- Next.js 16
- React 19
- TypeScript
- Supabase
- PayPal
- Gemini · Claude · GPT
- Date
- 2026
- Role
- Founder, full-stack design and development
The problem
Generic horoscopes are impersonal. Real astrology loses people the moment charts, houses, and aspects appear. Personal guidance should not require studying the theory behind it.
How I fixed it
The full platform, built from the ground up: an astronomy engine that computes a real natal chart from exact birth data, AI that turns it into readable guidance, and the subscription, billing, and content systems that run the business.
What I built
- A real astronomy engine that builds the natal chart from birth time and place
- AI written natal, monthly, yearly, and partner readings, plus an astrologer chat
- Multi-model AI (Gemini, Claude, GPT), routed server-side and swappable per plan
- Subscriptions and one-off purchases, metered by an entitlements engine (PayPal)
- Over 150 programmatic SEO pages (per-sign, compatibility, numerology) and free calculators
What it changed
- Personal, accurate guidance with zero astrology knowledge required
- A self-serve product: free to paid, credited automatically and safely
- SEO pages and calculators bring in signups on their own









Contact
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