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Astrolog

Free#5 of 13 in Astrology Software

Astrolog: A free desktop toolkit with broad chart systems, forecasting, and deep customization. Ranked #5 of 13 in Astrology Software by our editors (7.7/10); pricing: Free plan; best for desktop users wanting free, configurable astrology tools.

7.7/10Editor score
Visit Astrolog
Astrolog7.7 Visit Astrolog

At a glance

  • Editor score
    7.7 / 10
  • Pricing
    Free plan
  • Best for
    Desktop users wanting free, configurable astrology tools
  • Free plan
    Yes
  • Paid from
    None
  • Chart system
    Multi-system
  • Facts checked
    24 Sep 2026

  • Where it wins

    • Calculates natal, relationship, transit, and progression charts
    • Supports Indian/Vedic, tropical, and sidereal zodiac formats
    • Offers exports, macros, command-line options, and AstroExpression customization

  • Where it doesn't

    • Runs on desktop platforms rather than mobile
    • Does not provide API access
    • Its listed integration is limited to iCalendar

Our verdict on Astrolog

Astrolog is a free, open-source astrology chart calculation program for desktop users who want detailed charting across several traditions. It runs on Windows, macOS, and Linux, and its scope includes natal and standard wheel charts, relationship charts such as synastry and composite charts, and transit and progression calculations. Users can work with Indian/Vedic, tropical, and sidereal zodiac formats, making it relevant to people who need more than a single chart system. Its command-line options sit alongside graphical interfaces, so it can suit both visual chart work and more configurable workflows.

The breadth of its calculation and display features is a central strength. Astrolog includes calendars and graphs for transits and progressions, interpretations for natal charts, transits, and relationships, and astrocartography with 3D globe views. Its astronomical data features include ephemerides, asteroids, dwarf planets, fixed stars, and planetary moons. It also offers 3D houses, chart spheres, and animated charts. This range will appeal to astrology enthusiasts who want to explore different chart types and supporting data within one desktop program; people looking for a simpler, mobile-first chart experience may find it too expansive or choose a different kind of tool.

Astrolog is distributed with complete source code under GPL v2, and it is described as freeware rather than a product with paid tiers. Export options include SVG, PostScript, Windows metafile, and bitmap formats. Macros and AstroExpression customization add room to adapt workflows, while iCalendar is the listed integration. The trade-off is platform scope: Astrolog is a desktop application, with no mobile app or API access. It is a strong fit for solo users who value free, configurable desktop software; users who need mobile access, API connectivity, or broader integrations should look elsewhere.

Astrolog pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on astrolog.org

Astrolog fact sheet

Free planYes
Paid fromNone
Chart systemMulti-system
Transit forecastingYes
Synastry chartsYes
Report builderYes
Mobile appNo
Desktop appYes
API accessNo
DeploymentDesktop
PlatformsWindows, macOS, Linux
Built forSolo, Small business (editorial estimate)
Integrations1 integrations: iCalendar
PricingFree plan
Websiteastrolog.org
Facts checked24 Sep 2026

Astrolog integrations

Astrolog lists 1 integrations on its own site.

  • iCalendar

Alternatives to Astrolog

See all Astrolog alternatives →

Astrolog vs the competition

Compare Astrolog with any tool side by side →

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Featured on iTechGuides

Featured on iTechGuides — Astrolog 7.7/10

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Guides on astrology software

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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