Keep personal chart details personal
Understand the difference between a public reading page, a current session and an intentional saved profile.
Birth details can identify a person
A name combined with a date, exact time and birthplace is personal information. A public article URL should carry only public context, such as language or selected city. Birth inputs, private predictions and profile identifiers must not be casually inserted into shareable links or analytics events.
Read the actual save behaviour
A current in-memory result, a browser-device save and an authenticated account are different storage models. An account or cross-device backup is not available merely because a site has a save icon. Use a save action only when the interface explains what is stored, where it stays and how to remove it.
Print and share deliberately
A printed page or screenshot may reveal more than the chart diagram. Check names, input summaries, event notes and browser headers before sharing. A public synthetic sample is suitable for testing layout. Real personal examples belong in a protected review process, with the person’s permission and a clear purpose.
Original educational introduction · editorial review pending. Calculation limits are documented on the Methodology page.