Cookie Policy

Last updated: July 14, 2026

1. What this policy covers

This policy explains how Mirra, operated by EVERSINCE (RCS Bourges 999 875 461, Rue François Coillard, 18000 Bourges, France), uses cookies and similar browser storage. It complements our Privacy Notice. Cookies are small files stored on your device by your browser; “similar storage” includes session storage, which lives only in your browser tab.

2. Why you don't see a cookie banner

Mirra sets first-party cookies only: cookies for signing you in, and, if you arrive from an ad, cookies that remember which ad brought you here (see section 4). Our service is directed at a US audience; under US state privacy laws advertising measurement is disclosed here and in our Privacy Notice, and you can opt out at any time (section 6). If we direct the service at EU users, we will add a consent banner before any advertising cookie is set.

3. What we set

• Authentication cookies (first-party, httpOnly, secure): keep you signed in to your account after you use a sign-in link. They are essential to deliver the service and expire or renew with your session.
• Quiz progress(session storage): your in-progress quiz answers and current step, stored only in your browser tab so a refresh doesn't lose your progress. Cleared automatically when the tab closes; sent to our servers only when you submit.
• Checkout reservation timer(session storage): remembers when the paywall countdown started so it doesn't reset on refresh. Cleared when the tab closes.

4. Advertising measurement

If you arrive from one of our ads, we set two first-party cookies, mirra_attr_first (13 months) and mirra_attr_last (90 days), storing the ad click identifiers and campaign parameters that were in the link. Depending on which ad platforms we work with (Meta, Google, Pinterest, TikTok), their measurement tags may also run on our pages and set their own first-party cookies (such as _fbp, _ttp or _epik) used to match your visit to the ad you clicked. We use these solely to measure our advertising; they do not read your quiz answers, portrait or reading.

We never use fingerprinting, third-party analytics cookies, or cookies that follow you around other websites.

5. Third-party services you may visit

• Stripe: when you proceed to payment or open the billing portal, you are taken to Stripe's own pages (checkout.stripe.com, billing.stripe.com). Stripe sets its own cookies there, notably for security and fraud prevention, as described in its own cookie and privacy policies.
• Vercel: our web application is hosted on Vercel's infrastructure. Vercel does not set cookies on our pages; as our hosting provider it processes technical request data (such as IP addresses) in server logs, as described in our Privacy Notice.

6. How to control cookies and opt out

You can delete or block cookies and clear site data at any time in your browser settings. Blocking authentication cookies will prevent you from staying signed in, and clearing session storage mid-quiz will reset your progress. To opt out of advertising measurement (including the server-side sharing of conversion events described in our Privacy Notice), write to mirra@eversince.io and we will disable it for your account.

7. Changes and contact

If we introduce cookies that require consent in your region, we will add a consent banner and update this policy before doing so. Questions? Write to mirra@eversince.io.