Sidereal

The sky remembers you.

Your birth chart, cast from the real positions of the planets. A Seer who knows it by heart, reads today's sky against it, and explains every word it uses.

New to astrology? Learn the sky first — it's free to wander.

Your chart

Cast from the sky, not from a table.

Give the Seer the moment and place you were born and it computes the whole wheel with the Swiss Ephemeris — the same planetary math professional astrologers use. Every body at its true degree, every house, every aspect drawn at its actual angle.

Then it hands you the wheel itself. Tap any planet and the chart turns to it; tap a term you don't know and its lesson opens over the page.

Aries♈︎ Taurus♉︎ Gemini♊︎ Cancer♋︎ Leo♌︎ Virgo♍︎ Libra♎︎ Scorpio♏︎ Sagittarius♐︎ Capricorn♑︎ Aquarius♒︎ Pisces♓︎ Sun☉︎ Moon☽︎ Mercury☿︎ Venus♀︎ Mars♂︎ Jupiter♃︎ Saturn♄︎ Pluto♇︎

The twelve signs at the rim, your planets at their true degrees, and the aspects between them drawn across the middle.

The Seer

Somebody to ask, at three in the morning.

Ask a question in your own words and get a reading in plain ones. The Seer knows your chart, the sky as it stands today, and what you've told it before — so you never start from scratch, and it never answers as though it has just met you.

It glosses as it goes. When a reading says Saturn square Venus, both terms are doorways: one tap and you learn what they mean on your own wheel, not somebody else's.

You

I keep getting offered work I don't actually want. Is that me, or is that the sky?

Sidereal

Both, probably. Saturn is crossing your Midheaven this year — the top of your chart, the part of you the world gets to see. Saturn there doesn't hand you what you want. It hands you what you've said yes to, until you learn to say no.

You told me in March that you took the last contract because turning it down felt rude. That's the pattern this transit is asking about.

Saturn is the planet of limits and long work; the Midheaven is where your chart meets your public life. Tap either to read its lesson.

A consultation, mid-conversation.

Today's sky

The transits, read for you each morning.

The sky keeps moving after you're born, and where it lands on your chart is what astrologers call a transit. Sidereal casts a reading for today, one for the week, and one for the month — each about your chart in particular, not a horoscope written for a twelfth of the world.

Today

☽︎ Moon in Gemini

Squaring your Sun by mid-afternoon. A restless day for deciding anything; a good one for saying the thing plainly and letting it land.

This week

♀︎ Venus enters your 7th

The house of the other person. Old conversations get easier to reopen — which is not the same as them being finished.

This month

♄︎ Saturn on the Midheaven

The long one. Work you've been carrying out of habit gets heavy enough to notice, which is Saturn's whole method.

Readings arrive cast; you can ask them anything afterwards.

Your circle

The people you're trying to understand.

Add the people who matter — a partner, a mother, the friend you keep circling the same argument with. Sidereal casts their chart beside yours and reads the synastry: where you meet easily, where you grind, and what each of you is actually asking for.

A date of birth is enough to begin. A time and a place make it sharper.

Yours Theirs ☉︎ ♂︎ ☽︎ ♀︎ ♄︎ ♃︎

Solid where it flows, broken where it grinds — synastry, drawn rather than described.

Learn

Free to wander, chart or no chart.

The signs, the houses, the planets, and the aspects — each one drawn rather than described, at its true angle. You don't need an account to read any of it, and if you do have one, every lesson lights up with your own placements.

♈︎ Aries ♉︎ Taurus ♊︎ Gemini ♋︎ Cancer ♌︎ Leo ♍︎ Virgo ♎︎ Libra ♏︎ Scorpio ♐︎ Sagittarius ♑︎ Capricorn ♒︎ Aquarius ♓︎ Pisces

Start with the signs →

Where we stand on AI

Said plainly, rather than found out.

Sidereal uses AI to answer your questions, and we'd rather say so plainly than have you find out. We're not using it to do the thinking for us — we use it as a teacher, one that knows real planetary mathematics and can explain them patiently.

Once you've asked, it's up to you whether to heed the answer. Intuition takes precedence here; trust your gut and your own gifts. Not everyone can afford a professional reading — this is a way to learn what you need to know without one.

The math is not AI. Every position is computed with the Swiss Ephemeris, the same library professional astrologers rely on, and it would say the same thing with the power off.

More about why we built this →

What it costs

Start free. Pay when you want to ask.

Free

$0

  • Your natal chart, cast in full
  • Readings for today, this week, and this month
  • 3 asks of the Seer a day
  • Everything in Learn

Individual

$8.99a month

or $89.99 a year

  • Everything in Free
  • Seekings — bring the Seer a question of your own
  • Follow up as long as the conversation wants
  • Your circle, and the synastry between you

Your first 7 days are free, and cancelling takes one tap. Bought on the web, Stripe handles the card and we never see it; bought in the app, Apple bills it and you manage it in your Apple subscription settings.

Questions people actually ask

I don't know my birth time.

You can still cast a chart — the planets' signs will be right. The houses and your rising sign depend on the time, so those stay uncertain until you find it. A birth certificate usually has it; so, often, does whoever was in the room.

Is this the same as the horoscope in a newspaper?

No. A newspaper horoscope is written for everyone born under one sign — a twelfth of the world at once. Everything here is computed from your own moment and place, which is why two Leos get entirely different readings.

Do I have to believe in astrology?

No. Plenty of people use it the way they'd use a good question: something to think against. The math is real whatever you make of the meaning.

Who can see what I tell the Seer?

You. Readings are encrypted at rest and reachable only from your own account, we don't train models on them, and we don't sell anything. The privacy policy says exactly what goes where.

Can I get my data out, or delete it?

Both, from your account settings, without asking anybody. Export gives you everything; deletion means deletion.

Is there an app?

Sidereal runs in any browser, and there's an iOS app for the same account — whichever you sign in on, it's the same chart, the same Seer, the same memory.