What do I need to calculate my rising sign or birth chart?

Your date of birth and, for an accurate result, your time of birth too. With that data the app determines your rising sign and your Sun, Moon and Ascendant pillars.

What is zodiac compatibility?

It's a comparison between your sun sign and someone else's that estimates the affinity of your elements and offers an interpretation of the relationship between both signs.

Is the birth chart complete?

It's an essential version focused on the Sun, Moon and Ascendant, designed as an accessible introduction to your astrological map, not an exhaustive professional birth chart.

Free Astrology: Rising Sign, Birth Chart & Compatibility

Lunar Calendar

Follow the moon phase day by day —new, waxing, full, waning— together with its illumination and the main phases of each month.

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Rising Sign Calculator

Reveal your rising sign —the face you show the world— from your date and time of birth, complete with its interpretation.

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Mini Birth Chart

Work out your three astrological pillars —Sun, Moon and Rising sign— from your date and time of birth, each with its interpretation.

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Discover what the stars have to say

SiONo's astrology section lets you calculate your rising sign — the sign you were projecting at birth — get a mini birth chart with your three pillars (Sun, Moon and Ascendant) and check the astrological compatibility between your sign and your partner's.

All you need is your date and, for the rising sign and birth chart, your time of birth. Every calculation comes with its interpretation, as a free tool for self-knowledge and entertainment.

Frequently asked questions

What do I need to calculate my rising sign or birth chart?: Your date of birth and, for an accurate result, your time of birth too. With that data the app determines your rising sign and your Sun, Moon and Ascendant pillars.
What is zodiac compatibility?: It's a comparison between your sun sign and someone else's that estimates the affinity of your elements and offers an interpretation of the relationship between both signs.
Is the birth chart complete?: It's an essential version focused on the Sun, Moon and Ascendant, designed as an accessible introduction to your astrological map, not an exhaustive professional birth chart.