Terms of Use - Knowdrop

In short. Play fair, have fun, be at least 13. The game is free with optional ads and purchases. Coins have no money value. Questions are carefully checked but can still contain mistakes; please report them. Nothing here limits your rights as a consumer under the law.

1. Who we are

The app is provided by Kalmarium Services BV, the Netherlands, email kalmariumservices@gmail.com ("we", "us"). By installing or using the app you agree to these terms. Our Privacy Policy explains how we handle personal data.

2. Who can play

You must be at least 13 years old. If you are under the age of majority in your country, you need permission from a parent or guardian, especially for purchases.

3. Using the app

We give you a personal, non-exclusive, non-transferable right to use the app on your devices for your own, non-commercial fun.
Do not cheat, use bots or scripts, change or reverse engineer the app, abuse bugs, or try to get answers for ranked play in advance.
Choose a nickname that is not offensive, does not pretend to be someone else, and contains no personal contact details. We may change or remove nicknames that break these rules.
Do not use the app for anything unlawful, or to harass other players.

If you break these rules we may remove scores from leaderboards, or block access to online features. We will act in proportion and you can contact us if you disagree.

4. Questions and content

Questions are written with the help of AI and checked by a separate fact-check step against reliable sources. Even so, mistakes can happen and facts can change. The game is for entertainment, not for advice. Tap Report on any question you think is wrong; we review every report.

Pictures come from Wikimedia Commons under their own licences, listed in the app under Image credits. The app, its design, texts and question collection belong to Kalmarium Services BV or its licensors.

5. Your suggestions

If you suggest a topic or a question, you confirm that you wrote it yourself (or may share it) and that it contains no personal data of others. You give us a free, worldwide, permanent licence to use, edit, translate and publish it in the app and its marketing, without credit or payment. We decide which suggestions to use; all go through review and fact-checking first.

6. Ads

The free game shows ads from Google AdMob: only after a finished solo game, never in the middle of a game, never after a battle and not in your first 3 days. Your ad privacy choices are explained in the Privacy Policy.

7. Purchases

Payment: all purchases are made through Google Play and follow Google Play's terms. Prices are shown in the app and in Google Play before you buy, including VAT where it applies.
Plus (subscription): monthly or yearly. It renews automatically until you cancel. Cancel at any time in Google Play > Payments & subscriptions; you keep Plus until the end of the paid period. We will tell you in advance before any price change, as Google Play requires.
Remove ads forever: a one-time purchase that removes ads for as long as we offer the app.
Coins: used only for hints in solo play. Coins have no money value, cannot be exchanged for money and cannot be transferred. Hints and coins never work in battles or ranked play. We never sell random items or loot boxes.
Restore: purchases are linked to your Google Play account and can be restored on other devices, also after app updates.
Right of withdrawal (EU): for digital content that is delivered right away, you agree when you buy that delivery starts immediately, and you confirm you then lose the 14-day right of withdrawal. For subscriptions, the law of your country may give you other rights. Refund requests are handled by Google Play under its refund policy; you can also contact us.

8. Availability and changes

We work to keep the app running and fair, but we cannot promise it is always available or free of errors. We may change, add or remove features and content, for example to improve the game. If we ever stop the app, we will give reasonable notice and handle active subscriptions according to Google Play's rules and the law.

9. Liability

We are liable as required by law. We are not liable for indirect damage, or for loss of game progress caused by deleting the app or your data yourself, except where the law does not allow us to limit liability (for example in case of intent or gross negligence, or under mandatory consumer law). If you are a consumer, you keep all rights that the law of your country gives you.

10. Ending use

You can stop using the app at any time and delete your data in Settings > Delete my data. Purchases stay linked to your Google Play account.

11. Law and disputes

These terms are governed by Dutch law. If you are a consumer living in another EU country, you also keep the protection of the mandatory law of your own country. Disputes go to the competent court in the Netherlands, unless the law gives you the right to go to a court in your own country. Please contact us first; most problems can be solved quickly. The EU no longer runs its online dispute resolution platform; you can still contact your national consumer authority.

12. Changes to these terms

We may update these terms. The date at the top shows the latest version. For important changes we will tell you in the app before they apply. If you do not agree, you can stop using the app.

13. Contact

Kalmarium Services BV, the Netherlands
Email: kalmariumservices@gmail.com