Terms of use — Mentium

Note on the publisher's nature: Mentium is developed and published by an individual on an indie basis, with no associated legal entity at this time. Any reference to "the Studio" or "King Island Studio" in these Terms identifies the individual indicated above. When this evolves into a registered company, we will notify you at least 30 calendar days in advance inside the app.

1. Acceptance of Terms

These Terms of Use (the "Terms") govern your use of Mentium (the "Application"), a mobile trivia game developed and operated by Valentín Stancu (the "individual publisher", the "Studio" or "we") under the trade name "King Island Studio".

By installing, signing up for, or using the Application, you accept these Terms in full. If you disagree with any of them, do not install the Application or uninstall it and delete your account.

These Terms, together with the Privacy Policy, form the legal contract between you (the "User") and King Island Studio.

2. Eligibility

To use Mentium you must:

1. Be at least 13 years old. If you are between 13 and the age of majority in your country of residence, you declare that you have your legal guardian's consent.
2. Not be legally barred from using digital services in your jurisdiction.
3. Also accept Google Play's Terms of Service, which govern Application distribution.

If you do not meet these requirements, you may not use Mentium.

3. User account

3.1 Account types

• Google-linked account: you authenticate with your personal Google account. Your progress is saved in the cloud and accessible from any device.
• Guest (anonymous) account: you use the Application without providing email. If you uninstall or change device, you irreversibly lose all your progress. You can link a Google account afterwards via Settings → Guest account → Link with Google.

3.2 Your nickname and tag

• You choose a nickname unique within the system (3 character minimum). If already reserved by another player, pick a different one or one of the suggestions.
• You automatically receive a permanent 8-digit tag (#XXXXXXXX) so friends can find you.
• The nickname can be changed via Edit Profile. The tag CANNOT be changed.

3.3 Your responsibility

You are responsible for:

• Maintaining the confidentiality of your associated Google account (if used).
• All activity carried out from your account.
• Not impersonating third parties (public figures, other players, registered trademarks).
• Not using offensive, discriminatory or rights-infringing nicknames.

We reserve the right to force a change of inappropriate nickname or, in serious cases, to delete the account without prior notice.

4. License

We grant you a personal, worldwide, non-exclusive, non-transferable, non-sublicensable, revocable license to install and use the Application on compatible Android devices, exclusively for non-commercial personal entertainment purposes.

You may NOT:

• Modify, decompile, reverse engineer, disassemble or attempt to derive the source code of the Application.
• Remove copyright notices, trademarks or other proprietary notices.
• Distribute, sublicense, rent, sell, lend or transfer the Application to third parties.
• Use the Application for unlawful purposes or in ways that infringe third-party rights.
• Use the Application competitively to create a similar product.
• Remove or circumvent security or authentication measures.
• Use bots, scripts, automated tools, modified APKs or any "cheat" technique to alter results, rewards or stats.
• Access internal APIs, Firebase services or the Studio's Cloud Functions outside the flow intended by the Application.

Breach of any of the above may result in immediate suspension or deletion of your account without refund and, in serious cases, legal action.

5. Intellectual property

5.1 Studio content

All elements of the Application — code, visual design, "Mentium" mark, logo, characters (rivals, coach), avatars, frames, banners, economy system, mode balance, gameplay mechanics, audio (including the brand "audio stinger"), curated Classic-bank questions, AI prompts — are the exclusive property of King Island Studio and protected by applicable intellectual property laws.

5.2 AI-generated content

Questions, narratives, coach messages, rival lines and suspect responses generated by AI inside the Application are provided solely for personal entertainment purposes. Commercial use outside the Application is prohibited. The AI may produce content that is factually incorrect, incomplete or biased — it must not be used as an authoritative educational, medical, legal, financial or professional source.

5.3 Your input

The text you write (custom topics, Detective suspect questions, debates, etc.) is and remains yours. By submitting it to the Application you grant us a limited, non-exclusive, worldwide, royalty-free license to process it through the AI model and return a response. We do NOT use your input to train our own models or for any purpose other than generating your gameplay experience.

5.4 Third-party trademarks

Mentium mentions or reproduces certain registered third-party trademarks in its question categories (e.g. "Marvel Universe", "Formula 1"). These references are made solely for descriptive and identification purposes, without suggesting affiliation, sponsorship or endorsement by their holders. All trademarks belong to their respective owners.

6. In-app purchases and virtual economy

6.1 Purchase catalog

Mentium offers in-app purchases through Google Play Billing:

• Mentis packs (consumables): from 50 to 1,750 Mentis, prices vary per market and per Google Play.
• Rival Pack (non-consumable, €1.99): permanent access to the 5 rival characters with distinct personalities.
• Remove Ads (in-app purchase paid with 500 accumulated Mentis, not a direct purchase): permanent disabling of advertising on your account.

6.2 Virtual currency nature

Coins (🪙) and Mentis (💎) are internal virtual currency with no monetary value outside the Application. They are not real money, not redeemable, not transferable to other accounts and not withdrawable.

6.3 Formal seller and refunds

Google Ireland Limited (through Google Play) acts as the formal seller of in-app purchases in Mentium in most jurisdictions. This means:

• Your purchase receipt is issued by Google.
• VAT, invoicing and refunds are handled through Google.
• Refund requests are handled exclusively through Google Play, per their policy. To request one, go to play.google.com/store/account/orderhistory or use the Google Play app on your device.

The publisher (King Island Studio) receives a periodic net settlement from Google after platform commissions and taxes are deducted.

If Google approves a refund, the associated virtual content may be revoked from your account automatically.

6.4 Availability and modifications

We reserve the right to:

• Modify the catalog of products (add, remove, change price or content) at any time.
• Modify the economy (mode rewards, entry costs, Mentis↔coins ratio, chest drops, balance of any system) to maintain balanced gameplay.
• Run promotional events with special bundles or temporary discounts.

Modifications do not apply retroactively to purchases already made.

6.5 Loss of virtual currency

We are NOT responsible for the loss of virtual currency or content arising from:

• Voluntary deletion of your account.
• Closure of your account for breach of these Terms.
• Loss of access to your associated Google account.
• Use of a guest account followed by uninstall or device change.
• Game economy changes (rebalances).

7. User conduct

By using Mentium you agree to:

• Not use unlawful, offensive, discriminatory, threatening, sexually explicit or hateful language in custom topics, Detective suspect questions, nicknames or any other free-text entry point.
• Not attempt to bypass content moderation (blacklist filters, AI escape hatch, length sanity).
• Not abuse the gift system between friends (mass sending, gifts coordinated with multiple accounts).
• Not abuse matchmaking (e.g. repeatedly abandoning Online matches to manipulate your rival's ELO, creating multiple accounts to face yourself).
• Respect other players in the friends section and Online matches.
• Not file false reports on correct questions to abuse the report system.

Breach may result in warnings, restrictions on social features (friends, online, gifts), temporary suspension or permanent account deletion at the Studio's discretion.

8. Advertising

If "Remove Ads" is not active, the Application displays advertising served by Google AdMob:

• Interstitial ads between matches (frequency-capped).
• Rewarded ads voluntary to earn lives, coins, gems, double rewards or unlock additional questions in Detective.

Ads are operated by third parties and their content is NOT directly controlled by the Studio. If you encounter an inappropriate ad, report it through AdMob's own system (button in the ad corner) and at support@kingislandstudio.com.

Personalized-ads consent is managed via Google's UMP. You can change it any time from Settings.

9. Social features (Online, friends, gifts)

• Online mode (real-time PvP): costs 1 life ❤️ to enter; on win you recover the life + receive a reward + steal 1 life from your rival. On loss, the rival receives that life. On draw, both get a smaller reward.
• Friend system: maximum 50 friends. Friend requests can be rejected without justification.
• Gifts: 1 life ❤️ or 10 coins 🪙 per friend, max once per day per friend. Anti-fraud: max 5 gifts received per day per friend, max 3 unclaimed gifts simultaneously per player.
• Direct challenges: you can challenge a friend to an Online match; expires in 60 seconds if they don't respond.

The Studio does not mediate disputes between players. To report harassment or abusive conduct, contact support@kingislandstudio.com with details (nicks, tag, date, description).

10. Daily Challenge and rankings

• The Daily Challenge offers 10 identical questions for all players of the same language each day (UTC).
• The weekly leaderboard (League) resets every Monday at 00:00 UTC.
• Your participation in rankings means your nickname and tag are visible to other players in public rankings.
• If you want to appear anonymous, you may temporarily change your nickname, but the tag is always visible.

11. Service availability

• The Application is provided "as is" and "as available".
• We do NOT guarantee the Application will be error-free, uninterrupted or always available. We maintain the infrastructure with reasonable diligence but outages, maintenance, latency or occasional failures may occur.
• Features requiring internet (all AI modes, Online, leaderboards, cloud sync) DO NOT work offline. Classic mode and local data DO work offline.
• We reserve the right to modify, suspend or discontinue the Application or any feature at any time, with or without prior notice. In case of permanent discontinuation, we will notify you at least 30 days in advance inside the app and via email (if you have a Google-linked account) and provide you with a JSON export of your data.
• In case of discontinuation, refunds will not apply for purchases already made beyond what Google Play's refund policy and applicable consumer law require.

12. Limitation of liability

To the maximum extent permitted by applicable law:

• The Application is provided without warranties of any kind, express or implied, including (but not limited to) warranties of merchantability, fitness for a particular purpose or non-infringement.
• The Studio shall NOT be liable for indirect, incidental, special, consequential or punitive damages, including (but not limited to) loss of data, loss of progress, loss of virtual currency, loss of opportunity, lost profits or moral damages arising from use or inability to use the Application.
• The Studio's total cumulative liability for any claim arising from these Terms or use of the Application shall NOT exceed the amount you have paid to the Studio in in-app purchases during the 12 months preceding the claim, or €20 if you have paid nothing — whichever is greater.

This limitation does not apply to damages arising from the Studio's willful misconduct or gross negligence, nor to non-waivable consumer rights in your jurisdiction of residence.

13. Indemnification

You agree to indemnify and hold harmless the Studio, its affiliates, employees and providers against any claims, damages, costs (including reasonable legal fees) arising from:

• Your improper use of the Application.
• Your breach of these Terms.
• Your infringement of third-party rights (intellectual property, privacy, honor, etc.) through the Application.

14. Termination

14.1 Termination by you

You may terminate the contract at any time by:

• Deleting your account: Settings → Danger zone → Delete account. Complete erasure within 30 calendar days.
• Signing out and uninstalling the Application. Your account and data will remain active until inactivity-based deletion (3 years).

14.2 Termination by us

We may suspend or terminate your account immediately, with or without prior notice, in case of:

• Breach of these Terms.
• Fraudulent or abusive conduct (cheating, multi-accounting, leaderboard manipulation).
• Identity impersonation or third-party rights infringement.
• Inactivity exceeding 3 consecutive years.
• Legal or judicial requirement.
• Permanent discontinuation of the Application.

Termination does NOT entitle you to a refund of unspent Mentis, coins or virtual content (except as required by applicable consumer law).

15. Modifications to the Terms

We may modify these Terms at any time. Updated versions are published at Settings → Terms of use and at the public URL. The "Last updated" date in the header indicates the version in force.

Material changes will be notified inside the app before they take effect (at least 30 days in advance), giving you a chance to review the new Terms and, if you disagree, delete your account before they apply.

Continued use of the Application after the new Terms take effect constitutes acceptance of them.

16. Governing law and jurisdiction

These Terms are governed by Spanish law.

For consumers residing in the EU, this clause does NOT restrict the rights granted to you under the consumer regulations of your country of residence, including the right to bring proceedings before the courts of your domicile.

For users outside the EU, disputes shall be submitted to the courts of the city of residence of the publisher (Spain), with express waiver of any other jurisdiction that might apply, except where mandatory law requires otherwise.

Alternative dispute resolution: if you have a dispute, before going to court we encourage you to contact us at legal@kingislandstudio.com to attempt an amicable resolution. The European Commission offers the ODR platform (Online Dispute Resolution) at ec.europa.eu/consumers/odr — but as the publisher is an individual non-trader within the meaning of EU Regulation 524/2013, our formal adherence to ODR is voluntary. In any case, disputes will be attempted in good faith via prior direct contact.

17. General provisions

• Entire agreement: these Terms + the Privacy Policy constitute the entire agreement between you and the Studio regarding use of the Application, replacing any prior communication or agreement.
• Severability: if any clause is declared invalid or unenforceable, the rest of the Terms shall remain in full force.
• Non-waiver: our failure to exercise any right under these Terms does not constitute a waiver of that right.
• Assignment: you may not assign your rights or obligations under these Terms without our prior written consent. We may assign these Terms as part of a corporate operation (merger, acquisition, asset sale), notifying you inside the app.
• Language: the Spanish version is the legally authoritative one. Translations to other languages are provided for convenience; in case of conflict, the Spanish version prevails.
• Communications: notices from the Studio are made inside the app, by email (if applicable) or by publishing at the public URL. Notices from you to the Studio are sent to legal@kingislandstudio.com (contractual matters) or support@kingislandstudio.com (operational matters).

18. Contact

Valentín Stancu
Trade name: King Island Studio
Arganda del Rey, Madrid, Spain
Web: kingislandstudio.com

Contact addresses:

• General support / bugs / account: support@kingislandstudio.com
• Legal / DMCA / compliance: legal@kingislandstudio.com
• Privacy / GDPR: privacy@kingislandstudio.com
• Press / partnerships: hello@kingislandstudio.com

For matters relating to these Terms, reporting other users' breaches, support requests or any other question, write to the appropriate alias.

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This English version is provided for convenience. The Spanish version is the legally authoritative one. In case of conflict, the Spanish version prevails.