Comparison · Updated June 2026

Astrologer vs Janus

Janus, from Astrology House, is a mature professional Windows program that astrologers reach for when they want serious predictive work — primary directions, dynamic reports, and customizable charts — refined over many years. It is a paid desktop license for Windows with no browser version. Astrologer brings the same Swiss Ephemeris accuracy and the everyday professional techniques to any browser, free, with interpretation built in.

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Janus at a glance

A long-established professional Windows program with deep predictive and electional tools.

Maker	Astrology House (Janus). Long-running professional Windows software.
Platforms	Windows desktop only (Mac via emulation). No native web or mobile.
Pricing	A one-time desktop license, with paid upgrades between major versions. Check the maker’s site for current pricing.
Calculation engine	Swiss Ephemeris.
Best for	Professional astrologers on Windows who want deep predictive and electional tooling in a dedicated program.

Feature comparison

Feature	Astrologer	Janus
Deep predictive tools (directions, dynamic reports)	Broad pro set	Yes — a strength
Runs in any browser, any device	Yes	No — Windows install
Works fully offline	Needs a connection	Yes — once installed
One-time license vs free core	Free core / $7.99 Pro	One-time paid license
Astrocartography + relocation	Yes	Yes
Profections, progressions, returns	Yes	Yes — extensive
Electional + chart search	Electional + VOC	Yes
AI readings + plain-English interpretation	Yes	Report text, no AI
Synastry + composite	Yes	Yes
Live sessions + community + Academy	Yes	No
Calculation engine	Swiss Ephemeris	Swiss Ephemeris

Where Janus wins

Deep, refined predictive tooling — primary directions and dynamic forecasting reports.
A dedicated, customizable desktop program that works fully offline once installed.
A one-time license rather than a recurring subscription for the core program.

Where Astrologer wins

Runs in any browser on any device — no Windows, no install, no license key.
A free core, versus a paid desktop license.
AI readings and plain-English interpretation built in, which Janus does not offer.
Cloud-saved charts, live practitioner sessions, a community, and a built-in Academy.

The bottom line

For a Windows professional who wants the deepest predictive and electional tooling in a dedicated program, Janus remains a strong, serious choice. For everyone who wants the same Swiss Ephemeris accuracy on any device — with interpretation, AI, and nothing to install — Astrologer covers the everyday professional work for free.

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Frequently asked questions

Is Astrologer a free alternative to Janus?

Largely, yes. Astrologer uses the same Swiss Ephemeris and covers most everyday professional techniques in the browser for free, though Janus goes deeper on certain predictive tools like primary directions.

Does Astrologer run on Mac, unlike Janus?

Yes — Astrologer runs in any browser, so Mac, Windows, Linux, tablets, and phones all work natively. Janus is a Windows program.

Does Janus need to be installed?

Yes, Janus is desktop software you install on Windows. Astrologer runs in the browser with nothing to install, though it needs an internet connection.

Which has better interpretation, Janus or Astrologer?

Janus produces detailed report text; Astrologer adds live AI readings generated from your specific chart plus plain-English interpretation, on top of the same Swiss Ephemeris calculations.