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
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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
Zvezdana

Contact

Have a project in mind? Tell me what you are building. Within a day you will have a clear read on scope and how I would approach it.

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