Comparison · Updated July 2026

Astrologer vs Astrodienst (astro.com)

Astrodienst (astro.com) is the gold standard for free, accurate charts: it is run by the Swiss company that actually authors the Swiss Ephemeris, with an enormous range of chart options and respected expert-written PDF reports. Its well-known downside is a fragmented, dated interface. Astrologer runs on the same Swiss Ephemeris with a modern, interactive workspace.

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Astrodienst (astro.com) at a glance

The authoritative free chart site — and the home of the Swiss Ephemeris itself.

Maker	Astrodienst AG (Zürich, Switzerland), founded by Alois Treindl — authors and maintainers of the Swiss Ephemeris.
Platforms	Web only — no official native mobile app.
Pricing	Free chart drawings, ephemerides, Astro-Databank, and short interpretations; premium PDF reports by astrologers including Liz Greene and Robert Hand are sold individually.
Calculation engine	Swiss Ephemeris — they are the source of it.
Best for	Hobbyists through professionals who want authoritative, free charts and expert-written reports.

Feature comparison

Feature	Astrologer	Astrodienst (astro.com)
Authoritative free charts	Yes	Yes — the benchmark
Modern, interactive interface	Yes	Dated / fragmented
Expert-written PDF reports	AI + practitioner sessions	Yes — renowned authors
AI readings on demand	Yes (paid plans)	No
Astrocartography maps	Yes	Yes (ACG)
Mobile-first experience	Yes	Limited
Learning path + community	Yes	Articles / forum
Calculation engine	Swiss Ephemeris	Swiss Ephemeris (source)

Where Astrodienst (astro.com) wins

Unimpeachable calculation authority — they make the Swiss Ephemeris.
An enormous range of free chart options and an extensive ephemeris.
Premium reports written by genuinely renowned astrologers.

Where Astrologer wins

A modern, mobile-first, interactive interface instead of fragmented menus.
AI readings generated live from your chart, plus live practitioner sessions.
An integrated learning path and community alongside the tools.
The same Swiss Ephemeris foundation without the navigation friction.

The bottom line

Astro.com is the authoritative source and still the place for renowned expert reports. Astrologer is the more integrated day-to-day workspace: the same Swiss Ephemeris foundation, with an interactive interface, AI readings, and tools designed to fit on a phone.

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Frequently asked questions

Is Astrologer as accurate as astro.com?

Both use the Swiss Ephemeris. With the same birth data and settings, ordinary planetary positions should agree; Astrodienst is the source and maintainer of the ephemeris.

Why use Astrologer instead of astro.com?

Mainly the experience: a modern, interactive, mobile-first interface, AI readings, an Academy, and practitioner sessions, on top of the same calculation engine.