Enter two birthdays and Us & Stars maps the real planetary contacts between your charts — no compatibility scores, no “meant to be” verdicts. Just a clearer starting point for a better conversation.
A small daily reading for every sign — a mood to notice, a color to wear, a question worth asking. Regenerated each day, for reflection rather than prediction.
✎Each person's date, local birth time and birthplace time zone. Don't know the time? You get a limited view — we never make one up.
✦Measured contacts between seven planets across both charts — Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn — with the math shown.
❝Symbolic themes become thoughtful questions about affection, communication and boundaries. Keep what resonates. Leave what doesn't.
Astrology here is a symbolic lens — never a test your relationship has to pass. Consent, safety and real-life behavior matter more than any chart.
Seven planets. Two perspectives. No verdict. Free during beta.
Create your free comparison ↗BEFORE YOU BEGIN
Synastry compares two birth charts by looking at angular contacts between their planets. Us & Stars calculates these contacts and pairs them with symbolic conversation prompts. It does not measure relationship quality or predict a future together.
Yes. The current beta includes the comparison, up to 12 selected planetary contacts, reflection prompts and printing or saving as PDF. Free during beta. No account, credit card or subscription is required.
Select Time unknown. We use noon only as a reference, omit that person’s Moon and withhold all precise between-chart aspects if either time is unknown. You can still see a limited overview and general conversation questions. We do not guess a rising sign or houses.
No. There is no compatibility percentage, good-or-bad relationship score or soulmate verdict. Astrological interpretation is symbolic entertainment, not a scientifically validated assessment. Consent, safety and real-life behavior matter more than a chart.
The standard report is calculated in your browser. Names and birth details are not sent to an application server, placed in URLs or saved by the app. The private comparison page is excluded from analytics. A separate, clearly labeled owner-only AI test uses derived contacts, never birth details.
A sun-sign comparison considers only the Sun signs. With both birth times supplied, Us & Stars compares the Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn across two charts. This version does not calculate houses, rising signs, transits or a composite chart.
See our calculation methods and sources →Read a fictional synastry report →How we protect your details →