Understand your life map, the traditional Chinese way.
ZiWei Compass turns your birth data into a complete Purple Star Astrology chart — 12 palaces, 14 major stars, four transformations and decadal cycles — with plain-English interpretation.
Built for people who want the real thing
Not a horoscope gimmick. A precise chart engine with honest, readable interpretation.
Accurate charting
Correct lunar conversion, true-solar-time option and full 12-palace layout with 14 major and auxiliary stars.
Four Transformations
Natal, decadal and annual Si Hua — the “flying star” layer most apps skip.
Decadal & annual cycles
See which themes activate in each 10-year and yearly period of your life.
187 readings
Every major star, in every palace, explained in plain English — no mystical jargon walls.
PDF export
Export a clean, shareable chart and reading for your records or a reading session.
Privacy-first
No account required. Birth data is stored locally on your device, not on our servers.
How it works
Our engine is cross-checked against independent open-source implementations and classical texts. We publish exactly how brightness, transformations and true-solar-time are handled on the Methodology page — no black box.
Simple, one-time pricing
Pay once. Own it. No subscription, no surprise renewals.
- Full 12-palace chart
- All 14 major stars
- Annual & monthly flying stars
- No sign-up, no watermark
- All 187 star-in-palace readings
- Star brightness (bright / dim) ratings
- Professional PDF export
- All future Pro updates
- Long-form AI interpretation
- Personality, career, wealth, relationships
- Buy 3 for $9.99
- No subscription required
Prices in USD. App Store / Google Play prices may differ due to platform fees. 14-day refund policy.
FAQ
Is this a subscription?
No. Pro is a one-time purchase. AI readings are pay-per-use. There is no recurring charge.
Do I need an account?
No. The free chart works without signing in, and your birth data is stored locally on your device. You only need an email if you want to restore a Pro purchase on another device.
How accurate is the chart?
The engine follows classical Zi Wei Dou Shu rules with documented conventions for brightness and transformations. See the Methodology page for details and sources.
Which languages are supported?
English, Traditional Chinese and Simplified Chinese. Star names are kept in their original pinyin form with English explanations, so you learn the real terminology.
What about refunds?
Email us within 14 days of purchase for a no-questions refund.
Is this fortune-telling advice?
No. ZiWei Compass is an educational and entertainment tool for studying traditional Chinese astrology. It does not provide medical, financial, legal or life advice, and results are not predictions of the future.
The chart engine is being localized for English and Traditional Chinese. Want early access?