Constellar - Astrology Tool

Constellar is professional astrology software for anyone who wants to explore and understand astrology in a structured way. Create detailed birth charts, track astrological events, and discover patterns – on your phone, tablet, desktop, and in the browser.

PROFESSIONAL BIRTH CHARTS
Create beautiful and fully customizable natal charts. Choose from over 20 house systems including Placidus, Koch, Whole Sign, Regiomontanus, Campanus, and many more. Analyze all planets, axes, nodes, Lilith, Priapus, Chiron, and additional asteroids like Ceres, Pallas, Juno, and Vesta.

MANAGE AND SHARE YOUR SETTINGS
Create multiple configurations and themes to suit your needs. Once created, you can easily switch between them or share them with others.

ASTROLOGICAL EVENTS
Explore astrological cycles through time: ingresses, retrogrades, new moons, full moons, and exact aspect moments – from the past into the future. With the Pro plan, the range extends from 3000 BCE to 3000 CE.

CHART FILTERS
Find charts with specific constellations: filter by positions, states, and aspects to spot patterns across your chart collection and deepen your understanding.

MAJOR AND MINOR ASPECTS
All major aspects: conjunction, opposition, square, trine, sextile. Plus minor aspects on Pro: semi-sextile, quincunx, semi-square, sesqui-square, quintile, and bi-quintile.

IMPORT, EXPORT & SHARING
Export charts as PDF. Import and export in AAF format (Astrologisches Austausch-Format). Share your charts via app link or website link – perfect for exchanging with friends or clients.

CROSS-PLATFORM
Use Constellar on Android, iOS, Windows, macOS, Linux or everywhere else in the web browser – with a consistent interface across all platforms.

OFFLINE-FIRST WITH CLOUD SYNC
Work offline anytime and sync your data automatically across all devices as soon as you're online.

SECURE & ENCRYPTED
Your chart data is encrypted on your device before syncing. Your data never leaves your device unprotected.

START FOR FREE
Create up to 20 charts with cloud sync – completely free. Upgrade to Pro for unlimited charts, all house systems, asteroids, minor aspects, and the full event date range.