Terms of use

Anyone may use the calculators and reference pages for personal use without an account. Copying the site in bulk by automated means, or use that harms its availability for others, is not allowed.

The charts and texts are astrology: a traditional symbolic system that is not scientifically validated. They describe tendencies in the tradition's terms. They do not predict whether a relationship will last or fail, and they are not advice on relationships, health, money or the law.

Positions are calculated to about 0.03 degrees of NASA JPL Horizons for the years 1900 to 2100, but a result depends on the birth data entered: a wrong time or place gives a different chart. The Methodology page says how everything is calculated.

The text, design and code of Synastry.io are protected by copyright. Short quotations with a link back are welcome. Place names, coordinates and time zones come from GeoNames, licensed under Creative Commons Attribution 4.0 (CC BY 4.0), and are credited in the footer of every page.

Pages link to the sources they cite. Those sites are run by others, and we answer neither for their content nor for their privacy practices.

As far as the law allows, Synastry.io is not liable for losses that come from using the site or from relying on a chart or a text. Nothing in these terms limits rights that the law of your country does not let us limit.

These terms may change as the site changes; the date at the top shows the current version.