Aries
Historical still life selected for Aries

Aries astrology software

The Masters’Tools at yourFingertips

Professional astrology software for macOS for hands-on consultations and in-depth research.

Free seven-day trial

Use the complete macOS app on one Mac. Your seven days begin when you first activate Aries.

Aries Early Access

An easy-to-use, highly accurate astrology program.

Aries is fast, easy-to-use astrology software for the practicing astrologer. Its modern interface focuses on flow and productivity. Based on the open-source project Morinus, it includes a wide range of traditional astrology techniques.

  • A frictionless, hands-on workflow with fluid navigation for research, timing work, client sessions and professional chart analysis
  • Fluid time stepping from the keyboard or navigation bar
  • Work with charts and tables, search saved material, take notes and inspect chart details in the sidebar
  • Early Access for macOS, with builds for Apple Silicon and Intel. Windows and Linux coming Q4 2026

Languages

  • English
  • Français
  • Español
  • Italiano
  • Deutsch

More languages coming soon.

Aries workspace displaying the software license alongside a chart
The Aries workspaceOpen charts, inspect details, step through time and manage saved work.

Charts and workflow

Designed for hands-on practice.

Aries keeps frequently used actions close to the chart without reducing the amount of information available.

Charts

  • Natal, horary, electional, transit, solar and lunar return charts
  • Secondary, tertiary and minor progressions; solar arc and planetary returns
  • Synastry, midpoint composite and Davison charts
  • Round, compact, square, mundane, astrolabe and novel biwheel views

Navigation

  • Ambient Input for date navigation and opening saved charts, just type a number
  • Fast time stepping with the keyboard or navigation bar
  • Open any date as a transit chart or solar revolution with one click
  • Drag charts together for synastry and composites; press Tab to switch composite method

Inspector

  • Hover over a planet or point for immediate information
  • Press I to open positions, motion, dignities, receptions and aspects in the sidebar
  • Lunar mansions, tithis and source-backed interpretive material in the Inspector
  • Integrated Markdown notes stored separately for each chart

Chart display

  • Right-click for fixed stars, lots, twelfth-parts, antiscia, midpoints and asteroids
  • Planetary stations, heliacal phases and planetary days and hours
  • Nearby eclipses, time lords and other timing information on the chart
  • Custom chart styles, symbols, objects and colors for light and dark use

Directions and time

Primary Directions in depth.

Aries inherits the in-depth Morinus Primary Directions system and extends it with additional methods, points and chart animation.

Primary Directions

  • Zodiacal and mundane directions with the full range of legacy Morinus options
  • Placidus semi-arc and pole, Regiomontanus, Campanus and Topocentric systems
  • Direct and converse motion, secondary motion and configurable keys
  • New: Jean-Baptiste Morin’s excentric, latitude-aware 3D aspects

Directed points

  • Directions to planets, angles, house cusps and fixed stars
  • Dodecatemoria, antiscia, Fortuna and user-defined Arabic Parts
  • Declination antiscia and directions with lots and parts
  • Zodiacal and mundane directions animated in the chart drawing

Progressions and transits

  • Direct and converse secondary progressions and transits
  • Minor and tertiary progressions and solar arc
  • Infinite-scroll transit and progression lists with converse options
  • Annual and monthly directions and circumambulations

Time lords

  • Zodiacal Releasing, Firdaria and Decennials
  • Annual and continuous profections
  • Circumambulations and Lord of the Year
  • Time lords and planetary hours available in the chart workflow

Search and research

A sophisticated search engine.

Search across date ranges and chart conditions, inspect results, then open any date in the list with one click

Aries search results with technique, aspect, promissor and significator filters

Aspect search

  • Search radix, transit, direction and mundane aspects
  • Search planets, Arabic Parts and created points
  • Transits, converse transits, ingresses, profections and primary directions
  • Open a result as a chart, transit or its containing solar return

Calendar

  • Synodic cycles, eclipses and planetary ingresses in a customizable calendar
  • Celestial weather, heliacal phases and planetary stations
  • Animated graphical ephemeris
  • Eclipse list with embedded cartography and Saros-family features
  • Trace solar eclipse shadows and find the origin eclipse of a Saros series

Data and files

  • Import Solar Fire and Astro Gold collections, Astro-Seek .aaf and Morinus .hor files
  • Saved chart library with import and export
  • Custom places, timezone-aware chart entry and GeoNames search
  • PDF and agent-ready text export for charts and tables

Eclipses

Eclipses.

Eclipse list with embedded cartography and Saros-family features. Trace solar eclipse shadows and find the origin eclipse of any Saros series.

Astrocartography

Astrocartography and Local Space.

Geodetic options for Greenwich and Giza, Local Space lines, and right-click access to relocated solar returns and transits.

Astrocartography

  • Interactive 3D Globe or classic Map
  • Geodetic options for Greenwich and Giza
  • Local Space lines
  • See street names and hospitals for exact rectification

Relocated charts

  • Right-click for relocated solar returns
  • Right-click for relocated transits

Astrolabe

  • Medieval astrolabe visualization of primary movement of the sky
  • Revised zodiacal and mundane primary directions in the chart drawing

Calculation and customization

In-depth calculation, configurable display.

Aries exposes the calculation and display choices required for different schools of practice.

Calculation

  • Swiss Ephemeris positions, ayanamshas and precessed returns
  • House systems, orbs, dignities, terms, triplicities and decans
  • Arabic Parts engine inherited from Morinus and expanded for experimentation
  • Aspect grids, speculums, parallels, speeds and mundane positions

Traditional and astronomical data

  • Fixed stars, paranatellonta, rise and set times
  • Antiscia, dodecatemoria, midpoints, asteroids and Arabic Parts
  • Heliacal phasis, retrograde stations, eclipses and planetary hours
  • Lunar mansions and tithis in the Inspector

Presentation

  • Anglo chart mode inspired by classic astrology websites
  • Square charts for Renaissance practice
  • Custom colors, fonts, symbols and chart objects
  • Light and dark appearance follows the system
Complete feature list

Hellenistic & Late Antique

  • Whole Sign
  • Essential dignities
  • Triplicity rulers
  • Terms / bounds
  • Decans
  • Lot of Fortune
  • Hellenistic Lots in Chart
  • Profection charts
  • Profection tables
  • Zodiacal Releasing
  • Decennials
  • Dodecatemoria
  • Antiscia
  • Phasis Detection in Chart
  • Prenatal Syzygy
  • Interpretations from Valens’ Anthologies

Medieval & Perso-Arabic

  • Firdaria
  • Lunar Mansions
  • Planetary Hours
  • Almuten Chart
  • Almuten Zodiacal
  • Almuten Topical
  • Triplicity Directions
  • Circumambulations
  • Traditional fixed-star names in Primary Directions lists

Primary Directions

  • Primary Directions
  • Annual and Monthly Directions
  • Primary Directions in Chart
  • Placidus Semiarc
  • Placidus Under the Pole
  • Regiomontanus
  • Campanus
  • Topocentric (Polich–Page)
  • Mundane directions
  • Zodiacal directions
  • Combined mundane and zodiacal directions
  • Naibod key
  • Cardan key
  • Ptolemy key
  • True Solar Equatorial Arc
  • True Solar Ecliptical Arc
  • Secondary motion
  • Bianchini latitude method
  • Morin excentric aspects with latitude
  • Morin antiscia
  • Midpoints
  • Terms
  • Fixed stars
  • Arabic Parts
  • Angular Directions of Fixed Stars
  • User Speculum
  • Rectification

Timed Charts & Progressions

  • Transits, direct and converse
  • Secondary Progressions
  • Tertiary Progressions
  • Minor Progressions
  • Solar Arc Directions
  • Transit Search
  • Ascensional Transits
  • Graphic Ephemeris
  • Live time navigation with keyboard
  • Progression and transit comparison
  • Radix display in timed results
  • Stepping alerts

Revolutions & Returns

  • Solar Revolutions
  • Lunar Revolutions
  • Planetary Returns
  • Average Returns
  • Sidereal Returns (Marr)
  • Embolismus/Lunar Phase Returns
  • Tithi Pravesha annual soli-lunar returns

Relationship Astrology

  • Synastry with Drag&Drop
  • Composite charts
  • Davison Charts

Horary

  • Horary astrology engine based on William Lilly’s Christian Astrology

Locational Astrology

  • Astrocartography
  • Standard ACG maps
  • Local Space azimuth lines
  • Geodetic astrology with 0° Aries at Greenwich
  • Geodetic astrology with 0° Aries at Giza
  • Eclipse paths on maps
  • Map-based default-location selection

Fixed Stars, Eclipses & Sky Cycles

  • Fixed-star positions
  • Fixed-star aspects
  • Fixed-star parallels
  • Paranatellonta
  • Solar and lunar eclipses
  • Synodic cycles
  • Direct and Retrograde ingresses
  • Saros Cycle research

Natal Charts & Chart Types

  • Here and Now charts
  • Aspect tables
  • Tropical and sidereal ayanamsha options
  • Topocentric Moon
  • Lunar nodes
  • Chiron
  • Vertex
  • Asteroids
  • Square charts
  • Astrolabe charts

Tables & Analytical Tools

  • 30° Strip
  • Midpoints
  • Planetary Speeds
  • Mundane Positions
  • Zodiacal Parallels
Historical astronomers working with instruments

A living tradition.

Astrology passed through many hands. Aries is built on the open-source program Morinus. Morinus’s traditional terminology, calculation methods and Primary Directions engine are part of the foundation of Aries.

Continuing the open-source tradition, Aries is open to developers and vibe-coders who want to contribute new techniques and content.

Corpus Packs

Corpus packs turn source texts into optional, cited rule sets that Aries can evaluate against a chart. Rather than hiding an interpretation behind a generic keyword, they connect rules and judgments to their textual source.

The licensed version includes two public-domain corpus packs: working horary rules from William Lilly, and delineations of signs and planets from Vettius Valens’s Anthologies. The Lilly pack works as a horary engine based on Lilly’s rules and mechanics, with judgments linked back to the source.

Aries app icon

Buy Aries 1.0

A permanent Aries 1.0 license for macOS, valid on two devices.

US$233 + tax

Choose your country to see the price.

FAQ

Frequently asked questions.

Why is it called Aries?
It’s fast, it’s powerful and easy-to-use.
I have been using the same astrology app for the past 10 years. I like to use Aries, but I cannot lose my chart collection.
Good news. Aries can import most common astrology formats, like Astro Gold and Solar Fire’s .SFcht, astro-seek.com’s .AAF, and legacy Morinus .HOR files.
Do you offer Interpretations?
Aries is not a classic cookbook astrology app. However, the licensed version ships with two corpus packs: Horary astrology from William Lilly and delineations of signs and planets from Vettius Valens’ Anthologies. These packs serve as an example of what’s possible for the future of Aries. I count on the community of astrologers, authors, translators, and antiquarians to open source or sell their own corpus packs.
What about Astrocartography?
Aries stands for freedom of information and offers Astrocartography features including geodetic lines, local space and relocation charts.
Can Aries do…
Aries offers the full breadth of astrological techniques, modern and traditional. Please refer to the feature list. If there is a technique, ayanamsha, or house system that you feel ought to be included, please feel free to reach out.
What platforms does Aries run on?
As of now, Aries is for macOS only. However, we are working on releasing Windows and Linux versions in the not too distant future. Register for the newsletter to get notified about upcoming releases.
Open Source Software, so it is free?
The software is released under the AGPL v3 license. Aries inherits its core engine from Morinus, a legendary open source project started in 2008 by Robert Nagy. It also uses the industry-standard, open source Swiss Ephemeris by Alois Treindl. For contributing developers, researchers, people with limited means and all sly folks, Aries will always be free to compile from the public GitHub repo.
Can I get a discount?
Serious students of astrology who are struggling with limited means, and students enrolled in a university, may write an email to support@aries.sh to inquire about equity discounts. Aries is currently in Early Access.