Everything Under the
Celestial Vault
Chaldea isn't a horoscope generator. It's a complete astrological intelligence platform built on the deepest techniques of the Hellenistic tradition.
Core Platform
The pillars of Chaldea's analytical power.
14-Layer Synthesis Engine
A multi-layered analytical pipeline that examines sect, dignities, ruling chains, Lots, mutual receptions, angular planets, aspects, and more — then weaves them into a coherent narrative. Not keywords. Real synthesis.
Time Lord Techniques
Annual Profections, Zodiacal Releasing from Spirit and Fortune, Decennials, and planetary periods. Understand the chapters of your life and what timing is activated right now.
Electional Astrology Engine
Six purpose-specific rulesets scan upcoming windows to find the optimal time for launches, contracts, travel, medical procedures, and more. Automatically avoids void-of-course Moon, malefic aspects, and retrogrades.
Hellenistic Knowledge Corpus
Every response is grounded in the most comprehensive traditional astrology knowledge base ever assembled. Thousands of hours of expert-level scholarship, properly indexed and cited.
Multi-Chart Sessions
Load up to 4 charts simultaneously. Compare natal charts, overlay transits, explore synastry — with the AI referencing all charts in context. Your astrology research workspace.
And So Much More
Every feature is built on authentic Hellenistic technique.
Whole Sign Houses
Chaldea uses whole sign houses — the original house system of Hellenistic astrology — as its foundation, with support for other systems when relevant.
Sect Analysis
Day chart or night chart? Chaldea determines sect and adjusts every analysis accordingly — because a Saturn in a day chart is fundamentally different from a Saturn in a night chart.
Lot Calculations
Lot of Fortune, Lot of Spirit, Lot of Eros, Lot of Necessity — and dozens more. Computed with correct sect-based formulas and integrated into every reading.
Ruling Chains
Follow the domicile rulers from any point in the chart to see where power flows. Ruling chains reveal the hidden connections between houses and life topics.
Dignity Scoring
Essential and accidental dignities scored across multiple axes: domicile, exaltation, triplicity, bounds, decan, sect, angular position, and aspect relationships.
Transit Intelligence
Not just "Jupiter is in your 5th house." Chaldea layers transits over your natal chart, Time Lord periods, and profections to show what transits actually mean for you right now.