Your predictions. Your privacy.

Nostradamus is a small pilot game. You can play without giving us your name or email.

What we save

An anonymous browser identity connects your predictions, scores and streak. We record simple gameplay activity, such as visits, submissions and shares, to learn whether players return. Clearing browser storage or changing devices can start a new history. Email subscribers can restore their existing results and streak by opening a personal reminder link or requesting a sign-in link through Continue with email.

Email is optional

If you opt in, we save your email and when you agreed to reminders. We use it only for Nostradamus challenge reminders and sign-in links you request. Every reminder includes a no-login unsubscribe link. The play link also signs you into your player history on that device, so keep that personal link private and use the game’s share button to challenge friends. We do not sell or share your email for advertising.

Browser notifications

If you enable browser reminders, we store this browser?s push subscription with your player profile to send a daily notification when you have not completed the current question. You can turn notifications off on the result screen or in your browser settings. This is separate from email consent.

Inviting friends

If you subscribe through a personal invite, we record who invited you. That person sees your optional first name and their referral count on the website and in reminders. They never receive your email address. Invite attribution stays in your browser for up to 30 days.

How the app works

The local preview stores data on this computer. A configured hosted pilot uses Supabase for authentication and storage, and Resend to deliver emails. Essential browser storage keeps your session and draft order; we do not use advertising cookies.

Your choices

Skip the email prompt, unsubscribe from any reminder, or clear this site's browser data to start a new anonymous history. Clearing browser data does not delete results already stored by the pilot. For removal of stored records, contact the person who invited you to the pilot.