Guides & Tools · Free to start

Helpful guides to know yourself better.

A small, growing collection of interactive guides and tools, each rooted in classical tradition and built for everyday use. Read your health through your birth chart, find the way of eating that suits you, or plan your garden by the moon. Free to start, and nothing to download.

Interactive · Web-based · Free to explore

The collection

Guides that help you read yourself.


Each one is grounded in a classical tradition and designed for everyday use. Some are mine, one is Bo's, and more will be added over time. Take whichever speaks to where you are right now.

The Medical Astrology Guide
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The Medical Astrology Guide

Your health story, told by your birth chart.

Built on the same classical medical astrology I use in every one-to-one session. Enter your birth details and the app calculates your natal chart, reading it through the lens of iatromathematics to map your constitutional health blueprint: your elemental balance, body system vulnerabilities, natural rhythms, and the health patterns you were born with.

View tiers
Free · Always
Constitutional Blueprint
Sun, Moon and Rising health analysis, constitutional temperament, daily lunar guidance, and the Lua chatbot at introductory level.
Premium · €19.99/month
The Celestial Constitution
Full natal chart, all planets, twelve Whole Sign houses, medical house analysis, health transit tracking, the full Lua chatbot, and a personalised wellness calendar.
Get Your Free Blueprint

Free · No credit card required

The Diet Quiz
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The Diet Quiz

Find the way of eating that suits you.

There is no single diet that works for everyone. This short quiz asks about how you feel, how you digest and how you respond to food, then suggests which dietary approach may suit you best. However you answer, you receive a free guide explaining every approach it covers, so you leave with the full picture rather than a single label.

What you get
Your result
A suggested dietary approach
A considered starting point based on your answers, not a rigid prescription. Somewhere sensible to begin.
Free · With every result
The full dietary approaches guide
A downloadable PDF explaining every approach the quiz covers, so you understand the whole landscape and can make your own choice.
Take the Diet Quiz

Free · Includes a free PDF guide

The Biodynamic Moon Garden Calendar
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The Biodynamic Moon Garden Calendar

Plant by the moon. Grow with intention.

A fully interactive biodynamic planting calendar built by Bo Lemm. Real-time moon phases, zodiac signs, and growing guidance for 53 medicinal herbs and vegetables. Pay once and use it forever, with two free companion tools included.

What is included
The Calendar
Monthly grid, daily tasks, and a plant guide covering 53 herbs and vegetables.
Two free companion tools
A Companion Planting and Crop Rotation Helper, and a Lunar Phase Tracker.
€19One-off payment
Get the Calendar

No subscription · No expiry

The Medical Astrology Guide

Your health story, told by your birth chart.


Built on the same classical medical astrology I use in every one-to-one session, the Medical Astrology Guide calculates your natal chart and reads it through the lens of iatromathematics, the ancient practice of using planetary patterns to understand constitutional health.

Your Sun, Moon and Rising signs are not just personality archetypes. In classical medicine they map your elemental and humoral balance, your body system vulnerabilities, your natural rhythms, and the health patterns you were born with. Enter your birth details and begin.

Free · Always
Constitutional Blueprint
Sun, Moon and Rising health analysis, constitutional temperament, daily lunar guidance, and the Lua chatbot at introductory level.
Premium · €19.99/month
The Celestial Constitution
Full natal chart, all planets, twelve Whole Sign houses, medical house analysis, health transit tracking, the full Lua chatbot, and a personalised wellness calendar.

The Diet Quiz

No single diet works for everyone.


The right way of eating depends on you: your digestion, your energy, your constitution and how your body responds to different foods. This short quiz helps you find a sensible starting point, and sends you away with a free guide to every approach it covers, so the choice stays yours.


Nature already has the answers. Understanding the patterns is where healing begins.

Ready to begin

Start with your free blueprint.

The Medical Astrology Guide is free to start, works on any device, and takes less than two minutes to set up. Your constitutional health blueprint is waiting.