Modern Oracle (現代命理館, 9qi.dev) is a Traditional-Chinese fortune-telling web app for the Taiwan market, built and shipped solo. The pitch: tell it your birth time and get a chart in about three seconds — no account, no upload, nothing stored server-side.
What it does
- Five verticals — Bazi (八字) charts and yearly readings, Human Design, MBTI × destiny, fortune sticks (求籤), and name numerology (姓名五格)
- Compatibility readings — Bazi marriage matching, Human Design pair charts, MBTI pairing
- A daily almanac (黃曆) page with traditional calendar labels only, no superstition-as-fact
How it is built
- Static multi-page site on GitHub Pages — native ES modules, no framework, a vermilion-seal (朱印籤) design system
- A real astronomical calendar engine (solar terms, four pillars) that runs entirely client-side; birth data stays in the browser
- Payments via Stripe Payment Links, verified by a Cloudflare Worker; magic-link login with single-use, expiring tokens
- Free core with one-off deep readings (NT$199–380) and an optional subscription (NT$149/month)
Why it matters: it is a complete consumer loop — acquisition (Google Ads), measurement (GA4 events down to the SKU), and a paid funnel — run as a weekly experiment, not a one-time launch.