Two skies,
read as one.
Astra takes both your birth charts, computes the real aspects between them, and reads how the two of you meet — with a compatibility score whose weights are printed right on the page. Any pairing: partners, friends, family, colleagues.
Not a quiz. A conversation between two skies.
Synastry is the old art of laying one chart over another and reading where they meet. Astra does it from the real sky — and, unlike a black-box “you're 92% compatible”, shows you exactly how the number is built.
See the pull
Where your planets touch theirs — the trines that flow, the squares that spark, the Sun-and-Moon contacts at the heart of it.
Read the weather
Where the two of you move in step, and where you'll each have to translate. Growth edges, not red flags.
Trust the number
A transparent score from three published components with weights you can see — no hidden magic, same inputs, same result.
Read your compatibility.
Two sets of birth details in, your score and both big-threes out. Computed privately in your browser — nothing shared, nothing stored on a server.
A The first person
B The second person
Both charts computed live in your browser — nothing stored on a server
Here's how you meet.
Unlock your full compatibility reading.
The score is only the door. Inside: the whole synastry read in warm, plain language — every strong contact between your charts, what flows and what stretches, and an “Ask Astra about us”.
- The full written relationship reading (both charts)
- Every strong inter-aspect, named and explained
- The score breakdown, every weight shown
- Both big-three decks, side by side
- “Ask Astra about us” — grounded in both charts
- Printable / save-as-PDF, yours to keep
Instant, in your browser. A reflective, for-entertainment reading of two charts — inclusive of any bond, and never advice about whether to stay or go.
A “love calculator”, or your two charts?
- Knows two things: two Sun signs
- A number with no maths behind it
- Assumes romance, assumes a verdict
- “You're 92% compatible” — because it says so
- All ten planets in each chart, and the aspects between them
- A score from three components — with the weights printed
- Inclusive of any bond; never a stay-or-leave verdict
- Real ephemeris positions, read in plain language
Both decks, every contact, one reading.
Your two big-threes dealt side by side, the strongest aspects between your charts, and a warm synthesis of how the two skies meet.
…plus every planet in both charts, the full grid of aspects between them, and the score, weights and all.
A contact, and how it reads.
A's Moon trines B's Venus. One of you feels the room; the other loves through comfort and care — and here those instincts run downhill toward each other. Ease tends to arrive early between you, the kind that feels like being understood without explaining…
The full reading gives a passage like this for every strong contact between your charts — the flowing ones and the stretching ones alike.