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Head-to-head · Astrology Software

Astrolog vs Kepler

  • Updated Sep 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Astrolog #5 in Astrology Software 7.7/10 Free plan Free plan✓ 4 of 6 features Visit Astrolog
Kepler #8 in Astrology Software 6.9/10 From $300 ✓ 4 of 6 features Visit Kepler

Astrolog leads on 1 check, Kepler on 0, and 6 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAstrolog · 7.7/10
  • Free planonly Astrolog

Astrolog scores higher on our rubric for astrology software: 7.7 against 6.9 out of 10; our editors rank them #5 and #8.

Astrolog offers free plan; Kepler doesn't.

Astrolog is the better fit for desktop users wanting free, configurable astrology tools. Kepler is the better fit for windows users seeking a deep paid astrology suite.

  • Astrolog fits best

    Desktop users wanting free, configurable astrology tools

  • Kepler fits best

    Windows users seeking a deep paid astrology suite

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Side by side

Feature Astrolog 7.7/10 Visit ↗ Kepler 6.9/10 Visit ↗
At a glance
Editor score 7.7 6.9
Ranking #5 in Astrology Software #8 in Astrology Software
Best for Desktop users wanting free, configurable astrology tools Windows users seeking a deep paid astrology suite
Pricing model Free Paid
Starting price Not published Not published
Free plan ✓ (best) —
Free trial — —
Deployment Desktop Desktop
Platforms Windows, macOS, Linux Windows
Built for Solo, Small business Solo, Small business
Features Astrolog 4/6 · Kepler 4/6
Transit forecasting ✓ ✓
Synastry charts ✓ ✓
Report builder ✓ ✓
Mobile app — Not published
Desktop app ✓ ✓
API access — Not published
Specs
Chart system Multi-system Multi-system
Our review
Pros
  • Calculates natal, relationship, transit, and progression charts
  • Supports Indian/Vedic, tropical, and sidereal zodiac formats
  • Offers exports, macros, command-line options, and AstroExpression customization
  • Combines natal, forecast, relationship, harmonic, and Vedic chart tools.
  • Includes AstroMaps, EclipseMaps, ephemerides, and a moon calendar.
  • Exports natal listings and interpretive reports in four formats.
Cons
  • Runs on desktop platforms rather than mobile
  • Does not provide API access
  • Its listed integration is limited to iCalendar
  • Runs on Windows only.
  • Costs $300 as a one-time purchase, with no free plan.
  • CD version adds shipping and handling charges.
Our verdict

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,…

Read the review →

Kepler brings a wide range of astrology work into a Windows desktop application, serving users from beginners to professional astrologers. Its chart tools cover natal, progression, solar and lunar return, relocated, composite, and harmonic…

Read the review →
  1. AstrologAstrology Software 7.7Free plan
  2. KeplerAstrology Software 6.9From $300

Strengths and trade-offs

  • Astrolog — 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

  • Kepler — where it wins

    • Combines natal, forecast, relationship, harmonic, and Vedic chart tools.
    • Includes AstroMaps, EclipseMaps, ephemerides, and a moon calendar.
    • Exports natal listings and interpretive reports in four formats.

    Where it doesn't

    • Runs on Windows only.
    • Costs $300 as a one-time purchase, with no free plan.
    • CD version adds shipping and handling charges.

More comparisons

All astrology software comparisons → · Full ranking →

Guides on astrology software

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update