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QuizBU

Privacy Policy

Effective date: 02.10.2026

QuizBU (the "App") is a trivia quiz app. This policy explains what data is collected when you use the App, how it is used, who it is shared with, how long it is kept and how you can delete it.

1. Data we collect

  • Account data: Depending on your sign-in method: name, email address (Google, Apple or email sign-in) and an optional profile photo you upload. If you hide your email with Sign in with Apple, Apple's relay address is stored.
  • Guest account: Guests provide no name or email; an automatic username and account ID are created.
  • Gameplay data: Scores, coin balance and transactions, your answers, statistics, badges, level progress, leaderboard ranks, contest and exam results, bookmarked questions, battle results.
  • Battle data: During a battle your name, profile photo, score, answers and selected preset message/emoji are shared with the players you are matched with; the room data is deleted when the match ends.
  • Duel chat: Quick messages, emojis and short messages you write in duels are stored on our servers together with the sender account, room and time, to enforce the community rules, review reports and prevent abuse. Written messages are automatically checked for inappropriate language and personal information (phone numbers, e-mail addresses, links) before they are sent, and are delivered only when both players have turned on "Allow chat". Authorized moderators may review reported messages. Chat logs are kept for 90 days after the last message and then deleted; logs tied to a report under review are kept until the review is complete. Deleting your account also deletes your chat logs.
  • Notification token: Your device's push (FCM) token, to send notifications.
  • Crash and performance data: On crashes and errors: device model, OS version, app version and the error log.
  • Reports: Questions and users you report, and users you block.

2. How we use data

  • To create your account, sign you in and keep your session secure,
  • To run quizzes, scores, leaderboards, battles and contests,
  • To send notifications (you can turn them off in device settings),
  • To detect and fix errors,
  • To review and prevent abuse (e.g. inappropriate names/photos).

We do not sell your data.

3. Publicly visible information

Your username, profile photo and score can be seen by other users on leaderboards and in battles. You can report and block users with inappropriate names or photos inside the App; reports are reviewed.

4. Service providers

Data is processed only to provide the service by:

  • Google Firebase (sign-in, battle database — European region, notifications, Crashlytics crash reports),
  • Sentry (error and performance reports — servers in Germany),
  • Sign in with Google / Sign in with Apple (if you choose them),
  • Our hosting provider (app server and database).

The App currently shows no ads. If ads are enabled in the future, Google AdMob and mediation networks may process the advertising identifier and ad interaction data subject to your permission (iOS "Allow Tracking", EU consent form), and this policy will be updated.

5. Retention

  • Account data is kept until you delete your account.
  • Guest accounts are deleted immediately when you log out of the guest session; otherwise automatically 30 days after creation. You can keep your progress by linking the account to Google, Apple or email before then.
  • Battle room data is deleted when the match ends.
  • Question reports you sent are kept for moderation but unlinked from you when your account is deleted.
  • Records of notifications previously sent to you may still contain your user number; they contain no other information identifying you.

6. Deleting your account

  • In the App: Profile → Settings → Delete Account. Your account, sign-in record (Firebase), uploaded profile photo and data linked to your account are deleted immediately and permanently. If you used Sign in with Apple, the Apple authorization is revoked too.
  • Web: https://quizbu.com/delete-account?lang=en
  • Email: [email protected]

7. Children

The App is not directed to children under 13 and we do not knowingly collect data from children under 13.

8. Your rights and contact

To access, correct or delete your data or object to its processing, email [email protected].

9. Changes

When this policy changes, the new version is published on this page.