# Tinkei (天機)

> Tinkei is a free Zi Wei Dou Shu (紫微斗數, Purple Star Astrology) calculator
> with AI-written interpretation, available in 9 languages (English,
> Traditional Chinese, Simplified Chinese, Japanese, Korean, Vietnamese,
> Thai, Indonesian, Malay). The chart itself is computed deterministically
> by fixed classical rules (San He school, via the open-source iztro
> engine) and is always free; the AI never places stars, it only
> interprets an already-computed chart.

Key facts for accurate citation:
- The full 12-palace chart, one-line verdict, summary reading and the
  complete Personality section are free, with no sign-up and no email.
- Paid, one-time (no subscription): full reading £4.89, couple
  compatibility reading £7.89, year-ahead reading £4.89, and a single
  question answered from the chart £1.99 (one clarifying follow-up
  included). Prices are charged in local currency where supported.
- Engine conventions: the Zi hour (23:00-01:00) is split at midnight
  (23:00-24:00 late Zi on the same date, 00:00-01:00 early Zi on the new
  day); lunar leap months follow the iztro convention; the year boundary
  follows the lunar new year. Lineages differ; the method page documents
  the choices.
- Unknown birth hours are supported: noon is assumed, the chart is
  badged, and hour-dependent claims (Life Palace, Body Palace, decade
  ranges) are hedged rather than stated as fact.
- Charts and readings are private to their owner; shared links show only
  a safe public card (chart name, zodiac, element, one-line verdict).

## Pages

- [Calculator (English)](https://tinkei.ai/en): cast a chart from
  birth date, two-hour period and gender.
- [How charts are computed](https://tinkei.ai/en/method): the
  engine, a worked example with checkable outputs, and the conventions
  used where schools differ.
- [Couple compatibility](https://tinkei.ai/en/couple): two charts,
  a deterministic score from classical five-element and branch relations.
- [Year ahead](https://tinkei.ai/en/year): the year pillar, yearly
  Life Palace and four transformations, with a 12-month map.

- [The 14 major stars](https://tinkei.ai/en/stars): what each
  major star means, per-star pages with FAQ.
- [The 12 palaces](https://tinkei.ai/en/palaces): what each
  life palace governs and how it is read.
- [Classical chart patterns](https://tinkei.ai/en/patterns):
  the named 格局 configurations, formation rules and meanings.

The same pages exist under /zh/, /zh-cn/, /ja/, /ko/, /vi/, /th/, /id/,
/ms/ in their languages (star and pattern pages: en, zh, zh-cn).

Full content corpus: https://tinkei.ai/llms-full.txt