The Chart Engine
A complete native charting and forecasting suite — 14+ chart types and every classical and modern analysis panel, computed and drawn entirely offline.
This is the heart of ChartVault and, on its own, a professional astrology program on the level of the big desktop suites. Every chart is computed in-app and drawn with ChartVault's own SVG renderer — no third-party chart service, no internet. The planetary positions are drawn from NASA's JPL Horizons public-domain ephemeris (matching it to a fraction of an arc-second), with the MIT-licensed astronomy-engine for the Moon and the chart geometry.
What the engine gives you
Chart types (all native)
Natal · Transit (bi-wheel) · Solar Return · Lunar Return · Secondary Progressions · Solar Arc · Synastry · Composite · Draconic · Heliocentric · live N-th Harmonic (1–32 stepper) · Relocation · and the TimeMap graphic ephemeris. All grouped under one Charts ▾ menu.
Analysis panels (under every chart)
Essential Dignities · Aspect Grid · auto-detected Chart Patterns (T-Square, Grand Trine, Yod, Kite, Mystic Rectangle, Grand Cross, Stellium) · Annual Profection & Lord of the Year · Sect · Balance · Chart Shape · Points (Fortune, Nodes, Lilith) · Declination & out-of-bounds · Zodiacal Releasing · Fixed Stars · Asteroids & Chiron · Midpoints.
Craft tools
Six house systems (Placidus, Koch, Regiomontanus, Porphyry, Equal, Whole-Sign) · retrograde marks · stellium auto-spacing · editable orbs and minor aspects · interactive focus (click a planet or aspect to isolate it) · plot points on the wheel · one-click PDF export · and ✨ AI interpretation on every placement, aspect and panel.
In this section
- Overview & drawing the wheel — opening a chart, reading the glyphs, Enlarge.
- Interactive focus — isolating a planet or aspect.
- House systems — the six systems and when to switch.
- Chart types — a page (or grouped pages) covering all 14 natively.
- The analysis panels — what each panel shows and its ✨ Interpret.
- Orbs & minor aspects, AI interpretation, and PDF export.
Fully offline, fully yours
Zodiacal Releasing, Fixed Stars, the JPL-Horizons asteroids and live harmonics are the kind of advanced tools the expensive cloud suites lock behind a subscription. In ChartVault they're built in and work with no internet at all.
Detailed pages for each chart type and panel are being written.