Download Mastro Standard

Mastro Standard is completely free and will always be. It was built with one goal in mind: unlock the full power of astrology to everyone, without making any compromise. It is simply the best free astrology software in terms of features, ease of use, and performance.

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Upgrade to...

  • mastroPro

    Adds pro features such as:

    • tri-wheel charts
    • chart manager
    • database of 1200+ public figures
    • search features (direct motion, retrograde, lunar phases, drag & drop, etc.)
    • 90° dial
    • and much more...
    $60 CAD
  • mastroExpert

    Includes all the features of Mastro Pro

    +

    The world’s first expert system for natal, event, and synastry analysis.

    Learn more

    $160 CAD