How Vedikks works, in enough detail to check us.

1. The calculation layer

Every chart is computed server-side. Nothing about the astronomy is generated by a language model, and if the ephemeris module fails to load, the chart endpoint returns an error rather than a guess.

Reference charts you can recompute

These three charts use invented birth data, not any real person's. They were produced by the same library, flags and ayanamsa listed above, on 25 August 2026. If you run the code below and get these numbers, our calculation layer is doing what this page says. If you run another app and get different numbers, the table above explains the likely reason.

Machine-readable copy: reference-charts.json.

REF-A — 1 January 2000, 12:00:00, UTC+05:30, New Delhi (28.6139°N, 77.2090°E)

JD(UT) = 2451544.770833   Lahiri ayanamsa = 23.857084°

REF-B — 15 June 1990, 05:45:00, UTC+05:30, Mumbai (19.0760°N, 72.8777°E)

JD(UT) = 2448057.510417   Lahiri ayanamsa = 23.723717°

Note on REF-B. The Sun sits at Taurus 29°56'05", four minutes of arc from Gemini. This case is deliberately included: it is exactly where an app on a different ayanamsa, or a birth time off by a few minutes, will report a different sun sign. If you want one test that exposes convention differences between astrology apps, use this one.

REF-C — 9 November 1975, 23:10:00, UTC+05:30, Chennai (13.0827°N, 80.2707°E)

JD(UT) = 2442726.236111   Lahiri ayanamsa = 23.519839°

Reproduce it

Node 18 or later, then npm install swisseph@0.5.17:

const swe = require('swisseph');
swe.swe_set_sid_mode(1, 0, 0);            // SE_SIDM_LAHIRI

// REF-A: 2000-01-01 12:00 IST, New Delhi
const utHour = 12 + 0 / 60 - 5.5;
const jd  = swe.swe_julday(2000, 1, 1, utHour, swe.SE_GREG_CAL);
const ay  = swe.swe_get_ayanamsa_ut(jd);
const SID = swe.SEFLG_MOSEPH | swe.SEFLG_SIDEREAL;

console.log(swe.swe_calc_ut(jd, swe.SE_SUN,  SID).longitude);   // 256.2821
console.log(swe.swe_calc_ut(jd, swe.SE_MOON, SID).longitude);   // 196.7117

const asc = swe.swe_houses(jd, 28.6139, 77.2090, 'P').ascendant;
console.log(((asc - ay) % 360 + 360) % 360);                    // 343.1853

Longitudes above are rounded to four decimal places. If your build of the library reports a value that differs in the fourth decimal, that is rounding, not disagreement. If it differs in the first decimal, something in the inputs is different — usually the ayanamsa setting or the UTC offset.

2. The interpretation layer

Once the chart exists, a language model (Claude, from Anthropic) writes the answer. The chart is computed first and passed in; the model is not asked to do astronomy, and it does not calculate positions.

What the model receives before it replies: your calculated placements and lagna, your Vimshottari dasha position, current transits relevant to the question, the astrologer persona you selected if you chose one, and the recent messages of the conversation you are in.

3. Your data

What is stored, stated plainly rather than summarised as “secure”.

• Your birth details, per profile, so the chart can be recalculated rather than cached blindly.
• The questions you ask and the answers you receive, saved with the profile they were asked about.

What you cannot do from inside the app yet

• Browse or export everything stored about you.
• Remove your first (“Self”) profile. Additional profiles you create can be removed, with a typed confirmation.

Full erasure of your account and its stored records is handled by our team on request to support@vedikks.com, within the window set out in the privacy policy. The processors involved — where the database sits, who generates the text, what analytics run — are named in that policy.

If you only want a chart and would rather store nothing, the free Kundli generator calculates it in your browser without an account.

4. Safety and limits

Vedikks is guidance and reflection. It is not a prediction to plan a life around, and it is not care.

• No guaranteed outcomes, no fixed dates for marriage, jobs, recovery or money.
• Not a substitute for medical, mental-health, legal or financial advice, and not a diagnostic tool. If a question is really a health question or a money question, it needs a professional, not a chart.
• Not a remedy shop. Vedikks does not sell gemstones, pujas or fear-priced fixes, and it should not manufacture dread about Saturn, Rahu, Mangal dosha or Sade Sati in order to keep you reading.
• Not a reassurance machine. Asking the same worry ten different ways is a pattern worth noticing rather than feeding; we have written about that here.

If you are in distress, please talk to someone who can actually help — a doctor, a therapist, or someone you trust. An astrology app is not the right place to carry that alone.

5. Change log and corrections

This page is versioned deliberately. When the calculation stack, data handling or the stated limits change, the change is listed here with a date rather than quietly edited in.

• 2026-08-25 First publication. Calculation stack, reference charts REF-A to REF-C, data handling, and safety limits documented and checked against the running system.