Mastro has a modern and user-friendly interface. Charts are beautiful and interactive. See the aspects of a planet just by placing your cursor over it. Drag and drop planets to move forward or backward in time. Our documentation covers everything and is easy to understand.

Mastro has all the features you want and much more, including natal charts, transits, bi-wheel and tri-wheel charts, progressions, harmonics, returns, profections, primary directions, midpoints, lunar nodes, asteroids, fixed stars, eclipses, ingresses, interpretation, and the list goes on.

Mastro can be tailored to your needs, both appearance-wise and functionality-wise. It supports multiple coordinate systems (tropical or sidereal), reference planes, chart styles, house systems, and subdivisions. Orbs are customizable by angle or by planet. Mastro is available in English and in French.

Mastro Expert contains the world’s first expert system for natal, event, and synastry analysis, a groundbreaking achievement that is the result of years of research. This system powers two features that are exclusive to Mastro: the synthesis tree, and the Forecast Curves. See some examples.