The Endurance of Atlas
Subjected to over 24,000 rigorous tests, our code is pushed to the limit against extreme edge cases, and heavy loads to ensure accuracy and robustness.
Astrology software for serious practitioners
RhythmSeven
Architects of software designed to expedite the study and application of ancient astrology.
Generate ephemerides, catalogue events, and cast charts with Mercurial speed and accuracy.
Lux in Tenebris
SEC. 01 Software Overview
Instruments of inquiry
Tools for the curious soul.
Our tools are crafted for the curious soul, designed to be a companion in your exploration of the ancient arts. They are built to be yours for life, and here is what that means:
- ✓Lifetime licenses including all future versions
- ✓Lifetime support via email
- ✓Your research never leaves your computer(s)
- ✓Work offline, no internet required1
- ✓Fully native Windows 11 and macOS apps2
- ✓Run apps on up to 3 computers simultaneously
1Internet needed only to start the free trial and to activate a license
2macOS 15 Sequoia or later on Apple M-Series Macs
SEC. 02 Aquila — Event Generator
Product · Aquila
Aquila
Aquila is a desktop application that generates tables of astrological/astronomical events with stunning speed and accuracy thanks to the highly optimized search algorithm under the hood.
Use the optional event filter to isolate the events that matter most, saving time and sharpening your focus. Filter by celestial body properties, aspects, out-of-bounds and retrograde status, sign occupancy, essential dignity, and more.
Get the bird's-eye view you need to quickly pinpoint critical dates and timeframes using Timeline studies. These studies seamlessly integrate events generated from any combination of 50 different study types.
SEC. 03 Compass — Charting Application
Product · Compass
Compass
Compass is a desktop application for casting traditional wheel charts at the heart of astrological practice: Mundane, Natal, Transit, Primary Directions, Solar Arc Directions, and Secondary Progressions. Each chart opens in its own window, so you can keep several on screen and compare them side by side.
Every control sits beside the wheel rather than behind a dialog. Change the frame, the bodies, or the aspects and the chart repaints immediately.
Charts also open straight from sibling applications. Double-click an event row in Aquila, or a record or plotted point in Cygnus, and that moment is cast in Compass with its location, frame, bodies, and aspects already set.
SEC. 04 Cygnus — Ephemeris Generator
Product · Cygnus
Cygnus
Built for astrological research, Cygnus is a high-precision desktop application for generating ephemerides, sampling the celestial bodies at any interval across any date range, with publication-grade results.
Tabulate where the bodies are or the angles between any pair, or plot either as curves that reveal turning points and crossings at a glance, all from a geocentric, topocentric, or heliocentric origin. Drag a plot through time and hover any curve for its exact date and position.
SEC. 05 Perpetual Innovation
Perpetual Innovation
Shift-drag a planet to a transit, or Control-drag it to an aspect, and the chart lands on that exact moment. Both are innovations first developed by Rhythm Seven Software.
- Double-click an event in Aquila
- Its chart opens in Compass
- Shift-drag a body to a transit
- Control-drag it to an aspect
SEC. 06 Engineering Principles
Built to a higher standard.
Three commitments behind every application we ship.
The Swiftness of Hermes
Our applications are meticulously optimized. The result is a lightweight, incredibly responsive experience. We don't just build apps that work; we build apps that fly.
The Shield of Athena
We build our applications on modern, secure frameworks designed to maintain total privacy. It is industrial-grade strength wrapped in an elegant user experience.
SEC. 07 Pricing & Licensing
Yours for a lifetime.
Pay once and own forever. Every purchase is backed by a 15-day, no-questions-asked money-back guarantee, and you will be up and running in a matter of minutes thanks to our automated licensing system.
Ephy
Positional ephemerides featuring time steps down to 1 hour with NASA-grade accuracy.
Free
Download Ephy- ✓Geo-, topo- or heliocentric tables
- ✓Tropical or sidereal zodiac
- ✓Ecliptic or equatorial positions
- ✓Export to CSV, copy as Markdown
- ✓Presets for settings and body lists
- ✓Free to use, no sign-up required
Cygnus
Everything in Ephy, plus aspect and graphic ephemerides and time steps down to 1 sec.
$59
Get a Cygnus License- ✓Aspect tables for every body pair
- ✓Cycle angle, phase and separation
- ✓Positions and aspects as curves
- ✓See turning points and crossings
- ✓Chart any moment in Compass
- ✓15-day money-back guarantee
Compass
Cast precise natal, transit, and directional charts with Aquila and Cygnus integration.
$129
Get a Compass License- ✓Mundane, Natal, and Transit charts
- ✓Primary and Solar Arc Directions
- ✓Secondary Progressions
- ✓Twelve house systems
- ✓Drag bodies to transits and aspects
- ✓15-day money-back guarantee
Aquila
Generate tables of astrological and astronomical events for 51 study types.
$179
Get an Aquila License- ✓Scan centuries in seconds
- ✓Event Filter for precise questions
- ✓Merge studies into one timeline
- ✓Export events to file in CSV format
- ✓Copy events to Markdown or Excel
- ✓15-day money-back guarantee
Advanced Suite
Aquila and Compass in one bundle. Cast charts including those based on Aquila events.
- ✓Double-click an event to chart it
- ✓Moment and frame carried across
- ✓Automatic selection of chart type
- ✓Locations shared by apps
- ✓Natal data shared by apps
- ✓15-day money-back guarantee
Master Suite
Aquila, Compass, and Cygnus in one bundle. The complete toolkit at its best price.
- ✓Events and records open as charts
- ✓Moment and frame carried across
- ✓Automatic selection of chart type
- ✓Locations shared by apps
- ✓Natal data shared by apps
- ✓15-day money-back guarantee
Already own one of our applications? Contact us to upgrade your current purchase(s) to a suite.