What Asteria keeps
A birth chart is intimate data. Here is everything Asteria stores, why, and the control you have over it. In plain language, no legalese.
Without an account, charts and journal entries stay in this browser. They can vanish if you clear site data or open Asteria somewhere else. Sign in with a magic link and those charts move into your account so you keep them across devices. While signed in, new charts save to your account.
Asteria runs no advertising trackers and does not sell your data. When the operator enables it, a privacy-friendly analytics script (Plausible) may count page views only: no personal data, no IP storage, no tracking cookies. Your charts and journal stay private to you unless you create a share link.
Clearing browser data removes local (unsigned-in) charts on that device. Signed-in data lives with your account: export everything as a file or permanently delete the account from Account.
Privacy Policy
Effective 1 June 2026
This Privacy Policy explains, in legal terms, how Asteria (“we”, “us”, the “Service”) handles your information. It expands on the plain-language summary above and governs your use of the Service. By using Asteria you agree to this Policy.
Who we are
Asteria is an astrology web application that computes and interprets birth charts. It is operated by Maverick (@chadthemaverick), an individual developer, who is the data controller for the purposes of the GDPR and UK GDPR. Questions, requests, or complaints can be sent to chadthemaverick@gmail.com.
What we collect and why
Birth data. The name, date, time, and place you enter to cast a chart. We need these to compute the chart. We store them only for charts you choose to save, so each saved chart reopens exactly as cast. Place names are converted to coordinates (see Third parties).
Journal entries. Any text you write in the Journal, plus the sky-context stamped on it when you saved it.
Account data. If you create an account, your email address (used for the one-time magic-link sign-in).
On-device charts. Charts cast before you sign in are stored against a random identifier kept in your browser session, not against an account, until you sign in (which moves them into your account).
Preferences. Your colour theme and display preferences are stored in cookies on your device.
We do not collect special-category data beyond the birth details you voluntarily provide, and we do not knowingly collect data from children under 16.
How your data is used
Your data is used solely to operate the Service for you: to compute and display your charts and readings, store the charts and journal entries you save, authenticate your account, and remember your preferences.
We do not sell, rent, or share your personal data with advertisers; we do not use it for advertising or profiling; and we do not use your charts, journal entries, or birth data to train any machine-learning or AI model.
Legal basis (EU/UK users)
Where the GDPR or UK GDPR applies, we process your data on the basis of your consent (which you give by entering data and saving charts) and on the basis of performance of a contract (providing the Service you asked for). You may withdraw consent at any time by deleting your data or your account.
Third parties we rely on
Asteria uses a small number of third-party services, only as needed to function:
OpenStreetMap Nominatim: to convert a birth place name into coordinates. The place text you type is sent to Nominatim for that lookup.
Email delivery: magic-link sign-in and account emails are sent through an email/SMTP provider.
Google Fonts and a JavaScript CDN (jsDelivr): to load fonts used by the interface.
Plausible Analytics: if enabled by the operator, a privacy-friendly, cookieless analytics tool that records no personal data, no IP addresses, and sets no tracking cookies. It may be disabled entirely.
Cookies
Asteria uses only essential cookies: a session cookie to keep you signed in and to scope on-device charts, a CSRF-protection token, and a cookie remembering your colour theme and the most recent chart. We use no advertising or cross-site tracking cookies.
How long we keep your data
We retain your saved charts, journal entries, and account data for as long as your account exists. On-device charts persist in your browser until you clear it or sign in. When you delete your account, all associated charts and journal entries are permanently removed.
Your rights and controls
If you have not signed in, charts and journal entries live only in this browser: clear site data to remove them. After you sign in, open Account to export everything as a single file or permanently delete your account and all its data.
Depending on where you live, you may also have rights to access, correct, restrict, or object to processing of your data, and to lodge a complaint with your data-protection authority. To exercise any of these, contact chadthemaverick@gmail.com.
Security
Data is stored on the server in an access-controlled database, scoped so that no account can access another’s charts or journal. Sign-in tokens are stored only as hashes. No system is perfectly secure, but we take reasonable measures to protect your information and respond promptly to reported vulnerabilities.
Changes to this Policy
We may update this Policy as the Service evolves. Material changes will be reflected by a new effective date at the top of this document. Continued use after a change constitutes acceptance.