Swiss Ephemeris 2.10 · Built for professionals

The observatory-
grade
chart engine for
serious astrologers

AstroWatch pairs Swiss-Ephemeris precision with the deepest timing tools in modern astrology — natal, transit, progression and synastry work, rendered in charts worth framing. Built for Windows 11.

Windows 11 / 10Get it on Microsoft Store macOSComing soon iOSComing soon AndroidComing soon

Free to install · Pro upgrade unlocks the full engine · No account required to try

Live sky · 14:32 UTC
18 aspects in orb · sorted by tightness
AstroWatch — Natal · Transit · Solar Return
AstroWatch dashboard showing a natal chart wheel, planetary positions, aspects and the Sun & Moon panel
✦ Sky Report · New

Eclipse season is here — a Total Solar Eclipse in Leo (Aug 12) and a deep Partial Lunar Eclipse in Pisces (Aug 28) light up August 2026.

Read the report →
Powered by
Swiss Ephemeris · SE 2.10
28
house systems
2
zodiac frames
8
ayanamsas
21
chart themes
4
platforms · Windows live
Why astrologers switch

Everything the craft demands, nothing it doesn't

Four engines under one roof — precision, timing, presentation and interpretation — each built to a standard you can stake a consultation on.

01 · The calculation core

Configure the astronomy behind every chart

AstroWatch exposes the whole engine, not a locked preset. Choose your frame of reference, your house division and your node model — then trust the numbers, because they come straight from Swiss Ephemeris.

  • Tropical & Sidereal zodiacs with 8 ayanamsas — Lahiri, Fagan/Bradley, KP, Raman and more; Draconic coming soon.
  • 28 house systems — Placidus, Koch, Whole Sign, Regiomontanus, Campanus, Gauquelin… with automatic high-latitude fallback beyond ±66°.
  • True & mean nodes, three Lilith models, geocentric or topocentric parallax, and true- vs mean-solar-day progressions.
AstroWatch calculation settings for zodiac, ayanamsa, houses and progression rates
02 · The timing engine

See exactly when a contact perfects

The Aspect Calendar plots every contact across a span of time as smooth orb-curves — colour intensity reads as closeness — then hands you the exact hits in a sortable grid. Transit-to-transit, transit-to-natal, or natal-to-progressed.

  • Aspect Finder graphs & exact-hit grids over 30 days to a full year, exportable to CSV or your timeline.
  • Temporal Timeline — scrub the working chart by any unit from seconds to years and watch the sky move.
  • Movements of the Moon — lunar aspects, lunar days, void-of-course, eclipses and the 28 Arabic mansions.
AstroWatch Aspect Calendar timing engine with orb-curve graph
03 · The presentation

Charts and reports worth handing to a client

Twenty-one hand-tuned wheel themes across Dark and Light modes — from obsidian midnight to a medieval parchment codex — restyle the wheel without touching the data. Layer natal, transit and return rings, then export a print-ready figure.

  • Bi-wheel, tri-wheel & quad-wheel overlays with a full cross-layer aspect grid.
  • Synastry & relationship comparison, solar returns, and secondary progressions side by side.
  • Print-ready reports in Classic or Parchment styles — A4 or Letter, straight to PDF.
AstroWatch expanded multi-wheel view with cross-layer aspect grid
04 · The interpretation engine

Charts that read themselves

A smart interpretation engine turns the chart into prose — composing a chaptered, book-length natal report of 70+ pages in warm, human language, organised by the areas of life rather than raw astrology.

  • 70+ page written natal reports — grouped into life-area chapters with a cover, table of contents and page-referenced sections.
  • Plain-language headings — "Venus in Aquarius" reads as "Freedom in Love", with the astrological term kept alongside for reference.
  • Gifts, challenges & growth callouts throughout — exported print-ready to PDF in Classic or Celestial styles.
AstroWatch 70-page written natal interpretation report
One app, the whole practice

A complete desk, not a single tool

Natal & radix charts

Cast precise birth charts with configurable orbs, aspect sets and a live 18-aspect list sorted by tightness.

Transits & forecasting

Track the moving sky against any chart, with upcoming-transit strips and exact-hit dates for the next 60 days.

Synastry & composite

Overlay two charts, read cross-aspects in a dedicated grid, and weigh the contacts that actually matter.

Lunar practice

Void-of-course windows, lunar days, eclipse cycles and Arabic mansions — apply any moment to the chart.

Sun & Moon dashboard

Daylight arcs, solstice & equinox countdowns, phase, illumination and Sun–Moon elongation at a glance.

Solar & lunar returns

Cast precise returns for any location and year, then drop them straight onto the wheel as a layer.

Twenty-one wheel themes

Dress the chart to fit the room

Restyle the wheel in one click — data, layers and aspects stay exactly where they are. Drag to explore the full set.

A closer look

The whole workspace

Real screens from AstroWatch — no mockups.

Main dashboard
DashboardPositions, aspects, wheel & Sun/Moon in one glance
Movements of the Moon
Movements of the MoonLunar aspects, VoC, eclipses & mansions
Aspect Calendar
Aspect CalendarOrb-curve timing graphs
Calculation settings
CalculationThe full astronomical engine
Natal report export
ReportsPrint-ready natal figures
How it measures up

Built past where most software stops

 
Typical apps
AstroWatch
Ephemeris sourceThe astronomy behind the numbers
Varies / proprietary
Swiss Ephemeris 2.10
House systemsDivision of the chart
2–4
28 + high-lat fallback
Sidereal & ayanamsasVedic / KP practice
Often none
2 zodiacs · 8 ayanamsas
Timing engineAspect calendar & exact hits
✕
✓ Graph + grid + CSV
Lunar toolkitVoC · eclipses · mansions
Partial
✓ Full
Chart themesPresentation for clients
1–2
21 tuned themes
Native on all platformsWindows · Mac · iOS · Android
Web-only, usually
✓ Windows now · more soon
Print-ready reportsPDF export
Basic
✓ Classic & Parchment
Simple pricing

Start free. Upgrade when you're ready to work.

Install and cast charts for free on any device. Unlock the full engine — timing tools, all systems and exports — with a one-time Pro licence.

Free
$0
Forever · no account required
No credit card needed

Everything you need to cast and read a chart. Ideal for students and the curious.

Download free
  • Natal, transit & solar-return charts
  • Live aspects & Sun/Moon dashboard
  • Placidus + Whole Sign, Tropical zodiac
  • 3 chart themes
  • Timing engine & Moon movements
  • Sidereal, all houses & exports
  • Synastry, multi-wheel & progressions
  • Written interpretation reports
Most popular
Pro
$200$128.99 one-time
Lifetime licence · free lifetime updates
Launch price — save $71

The complete observatory. Every system, every timing tool, every export — unlocked for good.

Get AstroWatch Pro

Installs free from the Store — unlock Pro in seconds from Help → Upgrade to Pro inside the app.

  • Everything in Free, plus:
  • Smart interpretation engine · 70+ page written natal reports
  • Aspect Calendar timing engine + CSV
  • Full Moon movements & Arabic mansions
  • All 28 houses · 2 zodiacs · 8 ayanamshas
  • Synastry, multi-wheel & progressions
  • All 21 themes + print-ready PDF reports
Free vs Pro

Every capability, side by side

Capability
Free
Pro
Natal · transit · solar / lunar / planetary returns
✓
✓
Live aspects · Sun/Moon dashboard · lunation dial
✓
✓
Placidus + Whole Sign · Tropical only
✓
✓
3 chart themes
✓
✓
Save profiles + .awp import
✓
✓
Sidereal + 8 ayanamshas · all 28 house systems
—
✓
Full Vedic suite — nakshatras, dasha, vargas, ashtakavarga, doshas, horā
—
✓
Aspect Calendar timing engine + CSV
—
✓
Graphic Ephemeris / Time Map
—
✓
Full Moon Movements + Arabic mansions / lots
—
✓
Declinations (parallels, out-of-bounds)
—
✓
Synastry · multi-wheel · progressions
—
✓
All 21 themes + print-ready PDF reports
—
✓
Smart interpretation engine — 70+ page written natal reports
—
✓
Download

Built for Windows — more platforms on the way

The full engine on Windows 11 today, with macOS, iOS and Android in development. AstroWatch is local-first — your charts live on your device.

Windows

Windows 11 / 10 (64-bit)
· v1.1.0 ·
Get it on Microsoft Store
Available now

macOS

macOS 12 Monterey +
· Universal ·
Coming soon
In development

iOS & iPadOS

iOS 16 +
· iPhone & iPad ·
Coming soon
In development

Android

Android 10 +
· Phone & tablet ·
Coming soon
In development
Questions

Good to know

Every chart is computed with the Swiss Ephemeris (SE 2.10), the same DE431-derived engine trusted across professional astrology software. Positions are accurate to the arcsecond across the supported date range.

Your Pro licence is for you, not a single machine — install it on the Windows devices you personally use. macOS, iOS and Android editions are on the way, and your licence will extend to them as they launch. AstroWatch is local-first, so your charts live on your device rather than on our servers.

Yes. Switch to the Sidereal zodiac and choose from eight ayanamsas including Lahiri, KP (Krishnamurti), Fagan/Bradley, Raman and a custom value. Whole Sign houses, true nodes and topocentric positions are all first-class.

Pro exports print-ready natal figures in two styles — a clean Classic layout and a classical Parchment codex — sized for A4 or Letter and saved straight to PDF. Timing data exports to CSV.

The free tier casts full natal, transit and solar-return charts with a live aspect list, the Sun & Moon dashboard, Placidus and Whole Sign houses on the Tropical zodiac, and three chart themes — no account needed. Pro unlocks the timing engine, all systems, synastry and exports.

Yes. The ephemeris runs locally on your device, so charts calculate with or without a connection.

Stay in orbit

New features, first

Release notes, timing-technique deep dives and the occasional chart worth reading — a few times a month, no noise.