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Cookies and browser storage

We use only the cookies and browser storage the Service needs to work. There are no ads, analytics or third-party scripts.Version 1.1 · last updated November 5, 2026

This is an English translation for convenience. The Polish version is binding.

1. What cookies and browser storage are

Cookies are small files your browser saves. Local storage, IndexedDB and the app cache are places in the browser where the app keeps data on your device. They let Egzamy remember your sign-in, your language and your progress, even offline.

2. Why we do not ask for consent

  1. Consent is not needed when storing or reading information is strictly necessary to provide a service you asked for (Article 399(3) of the Polish Electronic Communications Law).
  2. Everything we store is necessary: for sign-in, security, remembering your language or keeping your study data on your device. That is why there is no consent banner.
  3. If we ever add something that is not necessary (for example analytics), we will ask for consent first and update this page.

3. Exactly what we store

The full list is below. None of these is used to track you on other sites or for advertising.

  • wos-sessionCookieNecessary
    Purpose
    Keeps you signed in (an encrypted WorkOS session). Only after you sign in.
    How long
    until you sign out, at most 400 days
    Set by
    WorkOS (sign-in) on our domain
  • wos-auth-verifierCookieNecessary
    Purpose
    Protects a single sign-in through the WorkOS or Google page (PKCE).
    How long
    10 minutes
    Set by
    WorkOS (sign-in) on our domain
  • ldek-auth-pendingCookieNecessary
    Purpose
    Remembers the step between sending an email code and signing in (encrypted).
    How long
    10 minutes
    Set by
    Egzamy
  • ldek-sessionCookieNecessary
    Purpose
    Tells the app you are signed in, so signed-out visitors send no sync requests. Holds no data about you.
    How long
    until you sign out, at most 400 days
    Set by
    Egzamy
  • ldek-session-generationCookieNecessary
    Purpose
    A random sign-in id that stops old tabs from using a previous session.
    How long
    until you sign out, at most 400 days
    Set by
    Egzamy
  • ldek-staffCookieNecessary
    Purpose
    Staff only: shows the admin panel after a server-side permission check.
    How long
    at most 400 days
    Set by
    Egzamy
  • NEXT_LOCALECookieNecessary
    Purpose
    Remembers the language you chose when it differs from your browser's.
    How long
    until you close the browser
    Set by
    Egzamy (language choice)
  • ldek:*Local storageNecessary
    Purpose
    Your study progress, notes, settings, your choice about anonymous usage counts and a referral code from a friend's link. They stay on this device; they reach the cloud only if you turn on sync.
    How long
    until you delete them in Settings → Your data or in the browser; the referral code 60 days
    Set by
    Egzamy
  • ldek-studyIndexedDBNecessary
    Purpose
    Files you add yourself (for example photos or background sounds).
    How long
    until you delete them in Settings or in the browser
    Set by
    Egzamy
  • ldek-pwa-*CacheNecessary
    Purpose
    App and question files, so studying works offline.
    How long
    until the next version of the app
    Set by
    Egzamy

4. Anonymous usage counts

  1. We count how often the atlas and games are opened, to know whether they are worth developing. The counters live only in the tab's memory and are sent without cookies, Account, IP address or content.
  2. Nothing is stored on your device for this, apart from your choice in Settings.
  3. You can turn them off in Settings → Your data ("Share anonymous usage counts"). A "Do Not Track" or "Global Privacy Control" signal turns them off automatically.

5. Stripe's payment page

When you go to payment, Stripe's page opens (checkout.stripe.com). Stripe sets its own cookies there, for example to prevent fraud, under its own privacy and cookie policy. We have no access to them.

6. Managing cookies and data

  1. Delete your study data in Settings → Your data. Delete cookies and other data in your browser settings ("Clear site data").
  2. Blocking the necessary cookies or browser storage stops sign-in and saving your progress.
  3. More about personal data: Privacy policy.