Current companion

Meet the sign before you text back.

Twelve zodiac AI companions built for real conversations, emotional timing, and chemistry that finally makes sense.

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Built for companions, prediction, and practical astrology
Calibrated by Sun, Moon, Rising, mode, and essence
01 / 06

Product Tour

From your chart to the next reply.

Simastry keeps the loop simple: calculate the real chart, paste the conversation, then compare the message you want to send against a forecasted reply.

01

Your chart

Birthday, time, and birthplace calculate the real big three.

Sun, Moon, and Rising are not treated like decoration. They are the base personality system that powers compatibility, companion setup, and learning surfaces throughout the app.

Inputs Date • Time • Place
02

Build a companion

Choose the path, calibrate the signs, then give them a name and essence.

Companions are shaped by mode, Sun, Moon, Rising, and visual tone, so they feel person-shaped instead of horoscope-shaped.

Companion setup Mode + Big Three
03

Predict Their Reply

Paste the conversation, ask the question, then test the reply you are considering.

Simastry forecasts what they might say next, explains the astrological logic underneath it, and lets you rerun the outcome against your own hypothetical message.

Forecast loop Thread + signs + question

Companions

Companions are calibrated, not randomly generated.

In the app, each companion can be shaped by path, signs, name, and essence. The demo below mirrors that setup flow so the website shows how personality changes when you change the inputs.

Starts with your chart

Refine your Sun, Moon, and Rising signs
Path

The app supports romance, friendship, or anyone you want to read more clearly.

The Big Three

Sun shapes the voice, Moon tunes the emotional layer, Rising changes the first impression.

Name and essence

After signs, the companion gets a name and a visual tone so it feels embodied.

Next context layer
relationship type texting style life stage attachment humor

Soulmate · Mysterious

Seren

Predict Their Reply

Paste the thread, ask the real question, test the message.

Predict Their Reply is the core moment: Simastry reads the exchange, calibrates the signs, explains the likely tone, and lets you try a different text before you send it.

Privacy-first Only paste conversations and personal details you have the right to use.

Simastry is built for consent-aware reflection, not surveillance. Early access keeps that expectation visible before conversation upload.

01 · Paste the thread

Conversation
you still up?
yeah. i was deciding whether to text you.
then i guess we had the same idea.
i want to know what that means.
Paste the real conversation, not a cleaned-up summary.

02 · Calibrate them

Their sign(s)
Sun · Libra Moon · Scorpio Rising · Aquarius
What do you want to know?
Will they reply tonight?
Predict Their Response

03 · Read the forecast

The stars say they’ll text:

I was thinking about you too. I just needed a second to feel it out.
Tone · Warm 84% confidence
What if I said…
come over and tell me in person.

Guides

Guides that make the forecast easier to use.

Astropedia sits after the prediction moment. It turns the why into practical sign-by-sign guidance: what this person needs, where tension lives, and how to phrase the next message.

Compatibility

Show why the match works, not just a number.

Simastry already breaks compatibility into core identity, emotional bond, first impressions, and growth edge. The site should make that explainability visible.

Your chart on file

Scrub your big three manually.

Inside the app, these placements are calculated from your birth details. Here, they update the compatibility read live so people understand what changes when the chart changes.

82%

Compatibility pulse

The Twelve

Every sign is a different conversation, and each one can be calibrated further.

The cast below is only the starting layer. In the app, each companion can still be tuned through Moon, Rising, path, and essence, so no sign is flattened into a stereotype.

Early Access

Read the person. Build the companion. Then choose the message.

Simastry brings together chart setup, companion creation, prediction, compatibility, and practical guides in one premium iPhone experience. Request an invite for the next cohort.

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