A free observatory · est. 2026
The inner sky,
read without a price.
Duality Astrology charts the heavens at the moment you were born — and every tool we build, from birth chart to synastry to daily horoscope, is free, forever. No monthly plan. No paywall. Just the stars.
What's inside
Tools that have always been behind a paywall — open at last.
Every feature below is unlocked the moment you arrive. There is no paid tier. There is no monthly plan. The price of curiosity is zero.
$0
Natal Birth Chart
Swiss-grade ephemeris. Planets, houses, aspects — rendered as a luxury wheel.
Cast a chart →$0
Synastry & Compatibility
Lay two charts side-by-side. Discover the aspects between you.
Open synastry →No subscription. No upsell.Every reading, every feature.
Every reading, every feature.
All set to zero.
SynastryTwo charts.
Two charts.
One conversation.
Lay your chart against someone else's and watch the geometry between you. Trines, squares, sextiles — all surfaced in one glance.
Open the synastry studio