SENKRONASTROCalculates your birth chart. Tracks your timing.
SENKRONASTRO calculates your birth chart with the Swiss Ephemeris, tracks how the sky is moving relative to your chart, and shows you the key periods ahead. You can open any interpretation with one tap to see the exact planet, aspect, orb and date it's based on.
Birth date, time and place are enough. Takes about a minute.
Tools you can use without an account
All free; nothing you enter is saved. Signs, degrees and dates come from the app's own calculation engine.
- Birth chart calculator
- Planets, houses, aspects and the chart wheel.
- Rising sign calculator
- See exactly which hours of your birth day each rising sign applies to.
- Moon sign calculator
- Find your Moon sign, and see whether the result is certain even without a birth time.
- Compatibility (synastry)
- See the aspects between two birth charts for free - real aspects, not a score.
- Lilith (Black Moon) calculator
- Lilith's sign, degree, and the dates it stays in that sign.
- Lunar Node calculator
- The sign, degree and date range of your North and South Lunar Node.
- Sky calendar
- The next Mercury retrograde, eclipse, new moon and full moon, all on one page.
- Mercury retrograde dates
- Mercury, Venus and Mars retrogrades, with shadow periods, in Turkey time.
- Eclipses
- Solar and lunar eclipses - whether they're visible from Turkey, and at what time.
- New moon and full moon calendar
- Every new moon and full moon - exact moment, sign and degree, in Turkey time.
Calculation, technical definition and interpretation never blur together
You can always see which part of a sentence is measurement, which part is astrological model, and which part is interpretation.
Calculation
“Mars at 18°42′ Leo.”
Planetary positions, houses and aspects are calculated with the Swiss Ephemeris. The same birth data always gives the same result.
Astrological definition
“Transit Mars squares natal Venus with a 0°24′ orb.”
Which point is in contact with which, at what angle, how close, and between which dates - all of it is visible in the table.
Interpretation
“This period may bring tension or movement around relationships and values.”
AI only works at this layer. It never produces a degree, an aspect or a date; it translates calculated data into plain language.
What can you do with an account?
- Transits and key periods
- How the sky is moving relative to your chart, and the dense periods ahead.
- Annual report
- The twelve months ahead, broken down by life area and by month.
- Solar Return and other timing techniques
- Solar and Lunar Return, progression, Solar Arc and profection.
- Astrocartography
- Compare candidate cities against your own birth chart.
- How it works
- The calculation method, what the AI does, and the review layer.
What SENKRONASTRO is not
What we don't offer should be as clear as what we do.
- It is not a daily horoscope app; it looks at your own birth chart, not your sun sign.
- It doesn't try to say something dramatic every day. If there's no significant shift, it says so plainly.
- It doesn't claim to know the future. Astrology is not a scientifically validated predictive method.
- Interpretations don't replace medical, psychological, legal or financial advice.
Frequently asked
I don't know my exact birth time. Can I still use it?
Yes, but with limits. Your planets' signs are barely affected by birth time; your rising sign, houses and anything based on them depend on it. If you mark your time as approximate or unknown, the app restricts the time-dependent sections accordingly and says so clearly.
How accurate are the calculations?
Planetary positions and houses are calculated with the Swiss Ephemeris and tested against the output of a reference professional astrology program. Calculation accuracy is not the same thing as interpretation accuracy - the two are separate.
Does AI calculate my chart?
No. AI only interprets data that has already been calculated. It is never allowed to produce a planetary degree, an aspect or a date, and everything it writes passes a second review before it reaches you.
Is astrology scientific? Does it predict the future?
Astrology is not a scientifically validated method of diagnosis or definite prediction. SENKRONASTRO's interpretations are offered for personal awareness, in the language of possibility; they don't replace medical, psychological, legal or financial advice.
Know your timing.
Enter your birth chart once; track your upcoming periods, relationships and year from one place.