Privacy

What we store

Only what it takes to cast your chart and write your analysis, and to take payment.

• Birth details: date, time (or that it is unknown), the place you chose from our list, its coordinates and time zone, the house system, and the first name you typed, if any. These are needed to cast your chart and, if you buy one, your analysis. For a compatibility analysis, the same details for the other person, which you enter on their behalf and should have their permission to use. For a baby’s or child’s chart, the same details for the child, which you enter as their parent or guardian; the analysis is written about them by name.
• Your chart and figures, cast from those details, and every analysis written for you, including its PDF. Analyses are kept so we can show what was delivered if a payment is disputed.
• Your email address if you buy, sign up for updates, save a chart to your email, ask to be emailed a chart link.
• Order records: what you bought, when, for how much, and Stripe’s identifiers for the payment. We never see or store card numbers. For an add-on, which chart it compares with or the year and place of the return.
• A message you send us through the help form: your address, what it is about, what you wrote and the order you named, kept to answer you and deleted with your account. If an email to you cannot be delivered, our mail service tells us, and we note it against your order so we can reach you.

What we do not do

Your birth details stay out of links, logs and ads.

• Birth details never appear in a link, a page title, an email subject, a log line or an analytics event.
• No advertising, no data brokers, no sale or sharing of personal data for marketing.
• No tracking cookies. Each cookie we set does one job: keeping you signed in after a sign-in link; remembering your own chart on this browser, by its number and never a birth detail, with a second that says only that one is remembered; the numbers of the orders paid for or opened on this browser, so your chart’s page shows the analysis you have instead of offering it again; holding your order while you choose; how you like your wheel drawn, so your analysis is laid out in it; an offer code from a link you followed; for an hour, the five signs of a birthday you looked up on our famous matches page, never the date; and, for the visit alone, where it came from (a site’s name, such as Google, and the first page you opened), saved with an order you place so we can see which sources lead to orders.
• Your browser also keeps, on your device alone: your reading settings (theme, text size, how your wheel is drawn), a form you have started and not sent, the birthday you entered on our home page or famous matches page (in that tab, until you close it, ready for your chart), your Guess the sign days, and which charts’ skies you have already seen.

Where data goes

A few services help us do this, and each sees only what its job needs.

To provide the service we use a small number of processors:

• Anthropic, whose language model writes the text. It receives the finished chart, which includes the birth date and time, the coordinates of the birth place and your first name if you gave one, together with the chapter brief, notes worked out from the chart and, for a chapter written after others, lines from the chapters already written. It does not receive your email address. For a compatibility analysis it also receives the other person’s chart and first name; for a year ahead analysis, the year and the place you chose.
• Stripe handles payment and holds your email and payment details under its own privacy policy.
• Resend delivers our emails: receipts, sign-in and chart links, refund confirmations, replies to your messages and, for members, the weekly and monthly analyses. It receives your address and the email itself, and tells us whether each email was delivered, bounced, opened or clicked: a bounce or a spam report against your address, so we can reach you another way or stop writing, and the rest counted by the kind of email alone.
• Hosting: the site runs on Vercel, the calculation service on Railway, and the database on Neon.
• Where it is kept: on servers in the United States. If you are in Canada, your rights under PIPEDA and, in Quebec, Law 25 apply, and the contact below is where to exercise them. If you are in the UK or the EU, you may also complain to your data-protection authority.
• Our own counts, kept on our servers and shared with no one: how many times each page is opened in a day, and the name of the site a visit came from (Google, say) or the campaign in its link; how many times a chart is cast, a birthday looked up for its famous matches, an offer seen, an analysis added, the payment page opened, Share pressed, a guess made in the game, a sign asked for on the home page or a calendar added; how often a calendar app (Apple, Google, Outlook) reads the calendars it subscribed to, by the app alone; how quickly the page you first open loads and answers (rated good, middling or poor, by the kind of page); the words searched for in the site’s own search and whether it found anything (never a search holding a number or an @); and how many of each kind of email we send are delivered, opened and clicked, as our mail service reports it. A number for the day, the page and the source, and nothing else: no address, nothing stored on your device for it, no identifier, and never a birth detail. A private page, such as your chart or your order, is counted by its kind alone, never by its address.

Place names come from a database bundled with the site (GeoNames, CC BY 4.0); nothing is sent to a geocoding service when you type a city.

How long, and how to delete

You can remove everything yourself, at any time.

Charts cast without a purchase are kept so that shared chart links keep working. Purchased analyses and their PDFs are available on your account for 12 months and may be removed after that; download your copy to keep it. Weekly and monthly issues stay on your account until you delete it. If you add your dates to your calendar, the calendar reads them from a private address that holds those dates and no birth details; you can replace the address from your account, and it stops when your membership ends. Deleting your account from the account page removes your charts, including any chart you entered for a compatibility analysis, your analyses, PDFs, sessions and the link to your Stripe customer record, immediately and irreversibly. Stripe retains the payment record it is legally required to keep. To remove a chart you cast without buying, or for anything else, email hello@underyourstars.com.

Your rights

You can ask what we hold, have it corrected, or have it deleted.

The person responsible for personal information at Under Your Stars can be reached at hello@underyourstars.com. You can ask for a copy of what we hold about you, ask us to correct it, or ask us to delete it, by email. We answer within a few days. If you are in a jurisdiction with a data-protection authority, you may also complain to it.

Changes

If this page changes in a way that matters, we will say so here with the date. Last updated November 7, 2026.