Nothing to store

Almost nothing

No accounts, no cookies, no analytics, no ads.

• On this device: which eras you have answered, and how — so you are never asked twice.
• One yes or one no added to the era's count, and a one-way fingerprint of the browser, salted and hashed, so one device counts once per era. The hour it arrived, never a finer moment.
• For two hours: a second hash of your rough network location, only to slow down floods. The raw signals and your IP address are never written down.
• The quiet human check keeps no record of you.