Privacy policy

Sidellia is a free web service that computes natal charts with professional-grade astronomy (Swiss Ephemeris) and explains them in plain language.

The data controller is the Sidellia team. For any inquiry, write to hola@sidellia.com.

For Sidellia to function we collect a limited set of information. To compute your chart you enter your date, time, and place of birth; the place is converted into geographic coordinates for the calculation. Some of it is generated through your use of the service: technical data about your connection and device (such as your IP address and browser language) and data about how you interact with the site. If you request your chart by email, we keep your email together with the computed chart.

We keep that data for as long as we run the service or until you ask us to delete it by writing to hola@sidellia.com. If you do not opt in to updates, that information is used solely for the delivery you requested.

Each calculation made on Sidellia is stored temporarily and without being linked to your identity, so we can understand in aggregate how the service is used (for example, which signs or countries are most common). These calculations are deleted automatically after 30 days.

We use this information to keep the service working: to compute your chart, to display the result, to deliver the material you request, and to attend to inquiries related to your use of the service.

If you opted in to updates, we may also contact you occasionally to inform you about Sidellia. You can withdraw your consent at any time by writing to hola@sidellia.com or by using the unsubscribe link included in every update email.

We do not sell your data. We do not share it with third parties for commercial purposes. We only work with providers strictly necessary for the service to function, who process data on our behalf.

We use no tracking cookies, no marketing cookies, no third-party analytics. The only cookies we may set are those strictly necessary for the site to function, such as the session cookie when you sign in with your email (managed by Supabase Auth and expiring on sign-out) and minimal technical cookies required for security reasons.

We do not use Google Analytics, Meta Pixel, or anything similar, and we do not follow you around the web. We do measure, internally and in aggregate, how the service is used (for example, which sections are viewed) to understand what works and improve it; this measurement stays within our own systems and is not shared with third parties.

When you use the service we record technical data about your connection, such as your IP address, from which we derive your country code using a local IP-range database (data courtesy of db-ip.com, CC BY 4.0 licence), with no third-party call. We may retain this technical data for as long as necessary for security, abuse prevention, and diagnostics.

To keep Sidellia running, we work with providers who process data on our behalf:

• Hostinger: site hosting and email delivery.
• Supabase: the database that stores your request (your email, the computed chart, and country code) and account authentication if you sign in.

Each provider processes data under its own data-processing terms.

You have the right to access, rectify, erase, object to processing, and port your data. To exercise any of these rights, write to hola@sidellia.com from the email you registered with.

If you believe we are not handling your request properly, you may file a complaint with your national data protection authority. For Spain, that is the AEPD (www.aepd.es).

If we update this policy, we will change the date at the top of this document and, for substantial changes, notify you by email if you subscribed to updates.