Stars✦Lab

Astrology that's astronomically accurate.

Most astrology apps reduce you to one of twelve sun signs. Stars Lab reads your complete birth chart from real planetary positions — the same NASA-grade astronomical data used to navigate spacecraft. Real astronomy underneath, real astrology on top.

Get your chart ✦ Your birth chart, free — no account or card needed to start
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NASA-grade data
Planetary positions from the Swiss Ephemeris, derived from NASA JPL — not approximations.
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Three traditions
Western, Vedic (Jyotish) and Chinese (BaZi) astrology, all from one birth moment.
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It learns you
Log how a transit actually felt — your next reading remembers, and predicts the repeat.
How it works

See your full birth chart — every planet, sign and house, explained — completely free. No account, no credit card.

For personalised horoscopes — daily, weekly, monthly and yearly — create a free account. It comes with 25 candles to spend, and you earn 25 more for every friend who joins.

What's inside

More than a horoscope

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The Starlog — a journal that learns you

After a reading, note how the day, week or month actually felt. Stars Lab ties your words to the exact transits behind them — so the next time Saturn squares your Moon or Jupiter crosses your Ascendant, your reading already knows how that landed last time, and tells you what to expect from the repeat. The longer you use it, the more it reads like it knows you — because it does.

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The Oracle
An astrology chat that has read your full chart. Ask it anything — answers come grounded in your real placements, not generic advice.
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Three traditions, side by side
See one birth moment through Western, Vedic (Jyotish) and Chinese (BaZi) eyes — and notice where all three agree.
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Returns & life timeline
Solar and lunar return charts, plus a timeline mapping the major transits of your whole life — behind you and ahead.
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Transit alerts
The real planetary movements hitting your chart, flagged before they peak — so nothing lands as a surprise.
Learn the real thing

Astrology, explained properly

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What is Swiss Ephemeris data?
The NASA-grade astronomical data behind every accurate astrology reading.
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What is a Saturn Return?
The ~29-year cycle that reshapes your twenties, fifties and beyond.
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What does your Moon sign mean?
Your inner emotional world — often more "you" than your Sun sign.
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What is your Rising sign?
The Ascendant — first impressions, and the backbone of your whole chart.
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Western vs Vedic astrology
Why your sign can be different in two systems — and why both are right.
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How to read your birth chart
Planets, signs, houses and aspects — the whole map, made simple.
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Is astrology real?
An honest answer — where exact astronomy ends and interpretation begins.
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How is a birth chart calculated?
From birth date, time and place to planetary positions — the data behind your chart.
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Your big three: Sun, Moon, Rising
The three placements that describe you far better than your sun sign alone.
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What Mercury retrograde means
The real astronomy of the backward motion — and how seriously to take it.
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Sidereal vs tropical zodiac
Why the same birth can give two different signs, and why neither is wrong.
Questions

Frequently asked

Is Stars Lab free?
Yes, to start. Your full birth chart — every planet, sign and house, explained — is free and needs no account. Personalised horoscopes run on an in-app credit called candles: a free account includes 25 starter candles, and you earn 25 more for every friend you refer. There is no subscription and no card needed to begin.
Do I need an account to see my birth chart?
No. You can see and explore your complete birth chart with no account and no credit card. An account is only needed for personalised daily, weekly, monthly and yearly horoscopes.
How accurate is the astrology?
Every planetary position comes from NASA JPL ephemeris data via the Swiss Ephemeris — the same class of astronomical data used to navigate spacecraft. Readings name the exact degree, sign and house, rather than reducing you to a single sun sign. The astronomy is exact; the interpretation is astrology.
Do I need my exact birth time?
It helps a lot. Your houses and Rising sign shift roughly every two hours, so an accurate birth time unlocks the structural layer of your chart. Without it you still get your planets and signs, but the house placements stay uncertain.
What is the Starlog?
The Starlog is a journal built into the app. After a reading, you note how the day, week or month actually felt. Stars Lab ties your words to the exact transits behind them — so when a transit repeats, your future reading recalls how it landed last time.
What's the difference between Western, Vedic and Chinese astrology?
They are three traditions reading the same birth moment in different ways. Western uses the tropical zodiac; Vedic (Jyotish) uses the sidereal zodiac and Nakshatras; BaZi (Chinese Four Pillars) reads the balance of elements. Stars Lab builds all three from a single set of birth details.

Ready to meet your chart?

Your birth chart is waiting — calculated from real planetary data, across three traditions, personalised to the exact moment you arrived.

Get your chart ✦ Free to start · takes about a minute