Sidereal · Jyotiṣa · for people who practise
Sixteen divisional charts. Aṣṭakavarga down to the kakṣā. A nakṣatra dial with all 108 pādas, a graphic ephemeris, a zoomable daśā timeline, and the sky as a sphere with real stars behind it. Every figure is checked against Swiss Ephemeris before it ships.
Free: your own chart — rāśi, navāṁśa, yogas, daśās, today’s sky.
Reference chart · 7 Nov 2001 · Ann Arbor
Take hold of it
The same component the app uses, computing the same degrees, running on this page.
No nakṣatra selected
Tārā from the natal Moon in Puṣya:favourablemixeddifficult
Inner marks natal, fixed · outer marks transit, 1 January 2027, 00:00 UT
Sidereal · Lahiri · mean nodes · ayanāṁśa 23.8778° · ecliptic longitude; celestial latitude is not plotted
The inner marks are the reference chart’s natal positions. The outer marks are where the sky stands on 1 January 2027, 00:00 UT. The shading counts the tārās from that chart’s janma nakṣatra, so the cells that matter for timing are the ones that look different.
Zoom in and the pādas appear, all 108 of them, at their exact boundaries. Select a graha and everything else steps back. In the app, this dial shares one time cursor with the ephemeris, the aṣṭakavarga profile and the daśā timeline, so moving the date in one place moves it everywhere.
Lahiri · mean nodes · ayanāṁśa 23.8778°
What is inside
Eight areas, each one built out. Every one of them shows the placements behind what it claims.
Charts
The instrument
Strength
Time
The sky
Reading
Relationships
Practice
How you know it is right
Software that only agrees with itself proves nothing. Jade is measured against an independent implementation, and the places they disagree are published.
Positions
Longitudes are pinned to Swiss Ephemeris fixtures in continuous integration. The Lahiri ayanāṁśa fit reproduces it to 0.0002 arcseconds across three centuries. That is close enough to be called reproduction, and it is the number the fixtures assert.
Techniques
Aṣṭakavarga, yogas, kūṭas and ṣaḍbala are compared against an independent implementation across seventeen charts. Aṣṭakūṭa’s input space is finite, so all 11,664 pairings were checked. Four of the eight tables were wrong before that check.
The sky
Lahiri is defined by Citrā at 180°. Jade’s star frame puts Spica at 179.984°, from a catalogue of 5,080 real stars. Look up at Regulus and it is where the sphere says Maghā’s yogatārā is.
What Jade will not do
Aṣṭakūṭa’s total sits as a footnote to its eight components, never as a headline percentage. Maṅgala doṣa arrives with its cancellations already computed beside it, because a doṣa reported without them is astrologically dishonest. A test fails the build if verdict language reaches a relationship page.
What Jade withholds
There is no ṣaḍbala total, because two of its twenty sub-components are unreconciled and a total is only as good as its weakest part. The East Indian chart renders correctly as geometry, but its regional sign arrangement could not be confirmed, so it does not ship. Two verified chart styles beat three with one invented.
Pricing
The free tier is not a demo with the numbers blurred — it is the rāśi and the navāṁśa computed exactly as the paid tiers compute them, with the yogas, the daśās and the reading. What costs money is more technique and other people’s charts.
Your own chart, in full
free forever
One chart, read to the bottom.
The astrologically fluent
$14/mo
Adds all sixteen divisional charts and 6 more.
Serious students and part-time readers
$79/mo
Adds transit alerts and 3 more.
Working astrologers
$199/mo
Adds event search and 4 more.
mostly still being built
Questions
Lahiri (Chitrapakṣa), or a custom offset if you work from your own value. Six more are named in the settings and disabled until their coefficients have been fitted against Swiss Ephemeris. Jade would rather show you that it knows what Krishnamurti is and has not verified it yet than quietly cast your chart in Lahiri and call it KP. Whichever you use is stored with the chart and printed in the interface.
Your choice, set explicitly and persisted with the chart. Mean is the default because most Vedic software uses it. Position basis is separate and also explicit: apparent positions by default, or true geometric positions, which is what Jagannātha Hora computes. The two differ by up to 55 arcseconds.
Positions are verified against Swiss Ephemeris fixtures in continuous integration. Derived techniques are diffed against an independent implementation across seventeen charts, and where they disagree the disagreement is published. Aṣṭakūṭa is verified against all 11,664 possible nakṣatra-pāda pairings.
North Indian and South Indian, drawn as real SVG so they stay sharp at any size and print correctly. The East Indian (Bengali) layout is deliberately not shipped: it renders correctly as geometry but the traditional sign arrangement could not be verified against a reference, and a plausible guess at a regional convention is worse than an honest absence.
No. Aṣṭakūṭa scores are shown as eight components with the rules that produced each one, never as a headline compatibility percentage. Maṅgala doṣa is reported together with its classical cancellations. Nothing in Jade returns a verdict, and nothing predicts death, disease or legal outcomes.
No. Every chart has a plain-English reading at read.jadeapp.co: each house with its sign, its lord, what sits in it and what aspects it, written in ordinary words, with the placements behind every paragraph one tap away. The technical sheet is always there when you want it. Nothing in the reading is generated prose with no arithmetic behind it.
It earns its place on two counts. It shows ecliptic latitude, which a flat wheel has nowhere to put, and which classical graha-yuddha and Rohiṇī-śakaṭa-bheda rules both turn on. And it draws a retrograde loop as an actual loop rather than a backwards arc. The stars are the Yale catalogue, 5,080 of them, so Spica sits at 179.984° under Lahiri and you can check the sphere against the sky.
One chart — your own. The rāśi and the navāṁśa on their own ascendants, every yoga with its cancellations, the vimśottarī daśā to five levels, today’s sky and the week ahead, and the whole chart written out in plain English. Those figures are the same figures the top tier computes: accuracy is never what you pay for. What the paid tiers add is the other fourteen divisions, aṣṭakavarga, the instrument, the sphere, and everybody else’s chart. No card, and no trial that expires.
Every person exports as JSON from their own page, and hard delete is a separate, explicit action and not a soft flag. Birth data is never sent to a third-party model.
Yes. The charts are responsive SVG and the interface is built for a phone as well as a desk. Checking a transit between sessions should not need a laptop.
The free tier casts one chart — your own — with the rāśi, the navāṁśa, every yoga and the daśā, to the same degree as any paid tier. No card, no trial clock.