← Knowledr

Terms

Version: 2026-05-18 · Last updated: 18 May 2026

These Terms of Service ("Terms" or "AGB") govern your use of Knowledr, a free swipe-quiz game operated by Markus Wildgruber from Regensburg, Germany. By creating an account or continuing to use Knowledr you accept these Terms.

Each section opens with a short plain-English summary. The formal clauses that follow are the legally binding terms.

§1 What Knowledr is

Knowledr is a swipe-quiz game. It is free to use; we cover our costs with ads. The service is currently offered to users in the EU/EEA and the United Kingdom.

  1. Knowledr is an online quiz game in which users answer questions by swiping cards ("Service"). The Service is offered as a web app and as native applications for iOS and Android via Capacitor.
  2. The Service is offered at no charge. We finance the Service through advertising (see §8).
  3. The Service is currently directed at users in Germany, the European Union, the European Economic Area and the United Kingdom. We may extend availability to further regions; we may also restrict availability where required by law.

§2 How the contract is formed

Browsing as an anonymous visitor doesn't create a contract. Creating an account does — and you confirm you're at least 16 years old at that point.

  1. You may use the Service anonymously without registration. In that case no use contract is concluded; these Terms apply only as house rules under §305a BGB.
  2. A use contract is concluded with the creation of a user account. To create an account you must (i) confirm that you are at least sixteen (16) years of age in accordance with Art. 8 GDPR and §8 BGB, and (ii) accept these Terms and the Privacy Policy.
  3. You may create only one account. We may close additional accounts that we reasonably believe belong to the same person (see §7).
  4. You are responsible for keeping your sign-in credentials safe. If your account is compromised, contact support@knowledr.app.

§3 Your account and our service

You play; we make the game work and keep leaderboards running. You can delete your account at any time; we can suspend or close it if you break the rules (§7).

  1. With an account you may use all standard features of the Service including game modes, leaderboards, friend challenges and the daily challenge.
  2. You may delete your account at any time via Profile → Delete account or by emailing support@knowledr.app. Effects of deletion are described in §13 and in the Privacy Policy.
  3. We may suspend or terminate your account in accordance with §7 (sanctions) or §13 (termination).

§4 What you can and can't do

Play fair, don't break things, don't be a jerk. No bots, no cheating, no harassing other users, no automated scraping of the question pool.

  1. You agree not to:
  2. (a) use any automated tool, bot, scraper, headless browser or comparable software to interact with the Service except as expressly permitted;
  3. (b) attempt to circumvent, disable or interfere with security, anti-abuse or rate-limiting mechanisms; this includes attempts to extract the question pool outside the standard gameplay flow;
  4. (c) create more than one account, share an account with another person, or use another person's account;
  5. (d) submit content (including username, friend-challenge text or feedback) that is unlawful, infringes third-party rights, is discriminatory, harassing, hateful, sexually explicit, or otherwise contrary to public decency;
  6. (e) impersonate any natural or legal person, or misrepresent your affiliation;
  7. (f) probe, reverse-engineer, decompile or copy the Service or its underlying software except to the extent permitted by mandatory law (§69e UrhG);
  8. (g) use the Service in a way that imposes an unreasonable load on our or our providers' infrastructure.

§5 Your content and the license you grant us

Things you choose — your username, your scores, friend challenges — show up to other users. You give us only what we need to display them inside Knowledr. We don't claim broader rights, and the licence ends when you delete your account.

  1. Content you contribute ("User Content") includes your chosen username, your profile avatar selection, your gameplay results, your friend-challenge invitations, your question reports and any in-app feedback you submit.
  2. You grant us a non-exclusive, royalty-free, worldwide, sublicensable (only to our processors named in the Privacy Policy) licence to host, store, process and display the User Content for the sole purpose of operating the Service. The licence does not extend to commercial exploitation outside the Service.
  3. The licence terminates automatically when you delete your account or remove the specific User Content. Where User Content has been shared with third parties (e.g. a friend-challenge URL), the third-party view returns a "no longer available" page upon termination.
  4. Avatars are limited to images from a pre-approved library that we provide. We do not accept user-uploaded avatar files in the current version of the Service.

§6 Content moderation and reporting (DSA)

If something on Knowledr breaks the rules — a slur in a username, a malicious question report, anything illegal — anyone can report it. We act on reports and explain the action we took.

  1. We operate the Service as an intermediary service under Regulation (EU) 2022/2065 (Digital Services Act). Our single point of contact for users and authorities is support@knowledr.app (communications accepted in English and German).
  2. Any person — registered or not — may report content believed to be illegal under Art. 16 DSA either by using the public report form at /report or by emailing the address above. Reports should describe the alleged illegality and, where possible, identify the content and explain why it is illegal.
  3. Where we restrict, remove or otherwise act on User Content, or restrict the provision of the Service to a user, we provide a clear and specific statement of reasons in accordance with Art. 17 DSA.
  4. You may dispute any such decision by replying to the statement of reasons or emailing the contact address above. We process internal complaints in accordance with Art. 20 DSA, free of charge and within fourteen (14) calendar days where feasible.
  5. Usernames are subject to a lightweight automatic check at signup; additional content moderation runs on report.

§7 Anti-abuse sanctions

We use technical measures to detect cheating and abuse. If we detect something we first remove ads and hide you from leaderboards (a flag you can recover from quickly). Persistent or serious abuse escalates to a 7-day suspension and then to a permanent ban — both with email notice and a 14-day appeal window.

  1. We use technical and organisational measures to detect and prevent automated abuse, multi-accounting and other violations of §4. We do not disclose the specific methods used; doing so would undermine their effectiveness. The legal basis for these measures is Art. 6 (1) (f) GDPR (legitimate interest).
  2. Where a violation is detected we apply the following sanction ladder:
  3. (a) Flag (automated, reversible): your account is hidden from public leaderboards and ads are no longer shown until the flag clears.
  4. (b) Temporary suspension (up to seven days, manual review): you cannot start new games during the suspension.
  5. (c) Permanent termination (manual review): your account is closed and your data deleted per the Privacy Policy, subject to your appeal rights below.
  6. For any non-automatic step we send a statement of reasons to your registered email and give you fourteen (14) calendar days to appeal by replying to that email or contacting support@knowledr.app.
  7. Multi-accounting (§4 lit. c) is enforced as follows: the first account we link to an existing account is monitored without sanction; if the linked account also exhibits violation patterns, all linked accounts may be terminated together.

§8 Advertising

Ads pay the bills. You'll see ads in the game; personalised ones only with your consent, which you can change anytime via the "Cookie settings" link in the footer.

  1. The Service is financed by advertising delivered through Google AdMob (in the native apps) and Google AdSense (on the web).
  2. Consent for personalised advertising is collected and managed by Google Funding Choices, a certified IAB TCF v2.2 consent management platform. Without your consent, no personalised advertising data is processed.
  3. Ads are clearly recognisable as such and visually separated from the game content.
  4. We are not responsible for the content of third-party advertisements; please refer to the relevant advertiser's terms.

§9 Paid features (currently inactive)

Knowledr is free today. If we ever add paid features (for example, an ad-free upgrade), this section describes how that would work — including your statutory right of withdrawal.

  1. Where we introduce paid features ("Premium Features") we will notify you and these Terms will apply in conjunction with the specific terms of the relevant Premium Feature, including price.
  2. Premium Features may be offered via the Apple App Store, Google Play, or our own payment processor. Where Premium Features are purchased through an app store, the store's payment, billing and refund policies apply in addition to these Terms.
  3. Right of withdrawal (digital content delivered immediately). As a consumer you have a fourteen (14) day right of withdrawal pursuant to §§312g, 355 BGB. For digital content delivered immediately your right of withdrawal expires before the period ends if (i) you have expressly agreed that we begin performance before the period ends, (ii) you have confirmed that you know that this consent causes you to lose your right of withdrawal upon beginning of performance, and (iii) we have provided you with a confirmation of your agreements. The Premium-Feature purchase flow will request these confirmations before any payment is taken.
  4. Where the right of withdrawal has not expired, you may withdraw by clear statement (e.g. by email to support@knowledr.app) within the fourteen-day period. Refunds for purchases made through Apple App Store or Google Play are processed by the relevant store.
  5. This section is currently inactive — no Premium Features are offered as of the date of these Terms. The section becomes effective with the launch of the first Premium Feature, at which point it will be classed as a material change under §12.

§10 Service availability

We try hard to keep Knowledr up but make no uptime promises. We may change or retire features with notice.

  1. We make commercially reasonable efforts to keep the Service available but provide no uptime guarantee. Maintenance windows, third-party outages and force majeure events may interrupt availability.
  2. We may change, add or remove features of the Service at any time. Where changes materially affect the Service we provide thirty (30) days' prior notice via email and in-app banner (see §12).

§11 Liability

Knowledr is free. We're liable as German consumer law requires, and not more. For ordinary negligence we're only liable for the kinds of damages you could expect from a free quiz game.

  1. The Service is provided free of charge and on a best-effort basis; no warranties are given beyond the statutory minimum under the BGB.
  2. We are liable without limitation for intent and gross negligence (Vorsatz und grobe Fahrlässigkeit) and for damage to life, body or health.
  3. In the case of slight negligence (leichte Fahrlässigkeit) we are liable only for breach of essential contractual duties (cardinal duties / "Kardinalpflichten") — duties whose fulfilment is essential to the proper performance of the contract and on whose observance you may regularly rely. In such case our liability is limited to damages typical of the contract and foreseeable at the time of contract conclusion.
  4. For slight negligence in respect of non-cardinal duties our liability is excluded to the extent permitted by law.
  5. Liability for guarantees and under the German Product Liability Act (Produkthaftungsgesetz) remains unaffected.

§12 Changes to these Terms

If we change something material — like price, license scope, or where disputes are handled — you'll need to actively re-accept the new Terms. For smaller edits (typos, clarifications) we give 30 days' notice but you don't need to click again.

  1. We may update these Terms. Where required we will notify you at least thirty (30) days before the changes take effect, by email to your registered address and via an in-app banner.
  2. Material changes include but are not limited to changes to: (i) pricing or paid features, (ii) the licence you grant in §5, (iii) your right of withdrawal, (iv) applicable law or jurisdiction, (v) categories of personal data we process or the introduction of new sub-processors that materially expand the data flow. Material changes require your express re-acceptance; until you accept, the previous version of the Terms continues to apply to you and access to the Service may be temporarily restricted.
  3. Other changes (e.g. typographical corrections, reformatting, clarifications without substantive effect) take effect after the thirty-day notice period; continued use of the Service after the effective date constitutes acceptance.
  4. You may at any time refuse a change by deleting your account (§3 (2)) or by signing out.

§13 Termination

You can leave anytime. We can close your account for the reasons in §7 with notice and an appeal route.

  1. You may terminate the use contract at any time, without notice, by deleting your account. The data effects are described in the Privacy Policy.
  2. We may terminate the use contract for cause in accordance with §314 BGB and the sanction ladder in §7. Statutory rights remain unaffected.
  3. Upon termination by either party your right to use the Service ends, your content licence (§5) ends, and your account data is deleted per the Privacy Policy.

§14 Dispute resolution

The EU online dispute resolution platform exists; we don't participate in consumer arbitration boards.

  1. The European Commission provides an online dispute resolution platform at https://ec.europa.eu/consumers/odr.
  2. We are not willing or obligated to participate in dispute resolution proceedings before a consumer arbitration board.

§15 Applicable law and place of jurisdiction

German law applies. If you're a consumer in another EU country, you keep the protection of your home country's laws and can sue in your home courts.

  1. These Terms and any non-contractual obligations arising from or in connection with them are governed by the laws of the Federal Republic of Germany, excluding the UN Convention on Contracts for the International Sale of Goods.
  2. Where you are a consumer in the meaning of §13 BGB and habitually resident in another EU Member State or the United Kingdom, the choice of law in (1) does not deprive you of the protection of mandatory rules of the law of your habitual residence (Art. 6 Rome I Regulation).
  3. Consumers may bring claims against us in the courts of their habitual residence or, optionally, at our registered seat (Regensburg, Germany).

§16 Severability

If any clause turns out to be invalid, the rest of these Terms still apply.

  1. Should any provision of these Terms be or become invalid or unenforceable, the validity of the remaining provisions shall not be affected. The invalid or unenforceable provision shall be replaced by such valid and enforceable provision that comes closest to the economic purpose pursued by the parties with the invalid or unenforceable provision.

Operator: Markus Wildgruber, Lisztstraße 4, 93053 Regensburg, Germany · support@knowledr.app · Imprint · Privacy Policy.