Privacy Policy — Koselig

This policy explains what happens to your data when you play Koselig on iPhone or Android and when you visit coffeebeansstudio.eu. We wrote it to match what the app actually does.

Who we are

Koselig is published by Coffee Beans Studio, the trading name of Dzmitry Kurtsikau, a private individual based in Poland (“we”, “us”). For any question about privacy, write to support [at] coffeebeansstudio [dot] eu.

In short

There are no accounts and no sign-in. We never ask for your name, email or phone number.
Your progress and settings are stored only on your device. We do not receive them.
The game shows ads only when you choose to watch a short rewarded video for the Stuck? check. There are no banners and no interstitial ads. The ads come from Google AdMob, which processes device data and identifiers.
Where the law requires it (for example in the EEA, the UK and Switzerland), you are asked for consent through Google’s consent form before personalised ads are shown.
The optional “No ads” purchase is handled by Apple or Google. We never see your payment details.
Koselig contains no analytics and no crash-reporting service. We do not sell personal data.

1. Data stored on your device

Koselig saves the following on your phone so you can continue where you left off:

game progress: opened levels, the current position of the pieces and your three save slots;
settings: sound, language, the chosen table, tray and pieces;
whether you own the “No ads” purchase;
your advertising consent choice, which is stored on the device by Google’s consent SDK.

This data stays on your device and is not sent to us. It is deleted when you delete the app. If you reinstall the game, the “No ads” purchase can be restored from Apple or Google (Settings → Restore); progress starts again.

2. Advertising: Google AdMob

Koselig uses the Google Mobile Ads SDK (Google AdMob) to show rewarded videos. To have a video ready when you ask for one, the app starts the SDK at launch and loads one video in the background. This means Google may receive data from your device even if you never watch a video.

Data that Google may collect and process through the SDK includes:

device identifiers: on Android the Advertising ID; on iPhone the identifier for vendors and other device signals;
your IP address, which can be used to estimate an approximate location (country or city);
device and app information: model, operating system and version, language, screen size, app version;
interactions with ads: which ads were loaded, shown, watched to the end or tapped.

Google uses this data to deliver and measure ads, to prevent fraud and abuse and — only with your consent where consent is required — to personalise ads. Without consent, Google may still show non-personalised or limited ads, which still use some device data for frequency capping, measurement and fraud prevention.

On iPhone, Koselig does not ask for permission to track you (App Tracking Transparency). Because of that, the Apple advertising identifier (IDFA) is not available to the app or to Google.

Ad networks. We use Google AdMob only and have not enabled ad mediation with other networks. The Android version currently contains software adapters that AdMob can use for mediation with Meta Audience Network and AppLovin; they are not enabled in our AdMob account, and we plan to remove them. If we ever enable another network, we will update this policy first.

Learn more from Google:

In regions where consent is required, Koselig shows Google’s consent form (User Messaging Platform) before ads are requested. You can accept, refuse or choose purposes. You can change your choice at any time in the game: Settings → Ads & data (this item appears where the consent rules apply). Deleting and reinstalling the app also resets your choice.

You can also limit ads on your device: on Android in Settings → Google → Ads (reset or delete the Advertising ID); on iPhone in Settings → Privacy & Security → Apple Advertising.

4. The “No ads” purchase

Koselig offers one optional in-app purchase, “No ads” (product koselig.no_ads). It is processed entirely by the Apple App Store or Google Play. We do not receive your name, card or payment details. The app only receives confirmation from the store that the purchase is owned and stores that fact on your device. See the Apple Privacy Policy and the Google Privacy Policy.

5. What we do not do

No accounts, no sign-in, no social features.
No analytics, no crash reporting, no tracking by us.
No access to your contacts, photos, camera, microphone or precise location.
We do not sell personal data and we do not use it for anything except what is described here.

The app uses internet access (for ads and the purchase) and, on Android, vibration for haptic feedback.

6. Children

Koselig is a general-audience puzzle game. It is not directed at children under 13 and is not part of a children’s category. Ads in Koselig are not configured as child-directed. We do not knowingly collect personal information from children. If you believe a child has provided us with personal data, contact us and we will delete it.

7. Legal bases (GDPR)

Consent (Art. 6(1)(a) GDPR) — personalised advertising and storing or accessing information on your device where consent is required.
Legitimate interests (Art. 6(1)(f)) — showing non-personalised ads to fund a free game, ad measurement and fraud prevention.
Contract (Art. 6(1)(b)) — delivering and restoring the “No ads” purchase.

Google acts as an independent controller for the data it collects through its SDK. Google and Apple may process data outside the European Economic Area under their own safeguards.

8. How long data is kept

Data on your device stays there until you delete the app. Data collected by Google is kept according to Google’s policies. If you write to us, we keep your email only as long as needed to answer and solve your request.

9. Your rights

You have the right to access, correct and delete your personal data, to restrict or object to processing, to data portability and to withdraw consent at any time. Because we do not hold game data on our servers, most requests are answered by deleting the app; requests about advertising data can be made to Google through the links above. You can always write to us at support [at] coffeebeansstudio [dot] eu. You also have the right to lodge a complaint with a supervisory authority — in Poland the President of the Personal Data Protection Office (UODO) — or with the authority in your country.

10. This website

coffeebeansstudio.eu is a static website. It uses no cookies, no analytics and no third-party fonts or scripts. It is hosted on GitHub Pages (GitHub, Inc.), and its domain name service is provided by Cloudflare. These providers may process your IP address and technical request data in server logs for security and delivery. See the GitHub Privacy Statement and the Cloudflare Privacy Policy.

11. Changes

If the app starts doing something new with data — for example a new ad network or analytics — we will update this page before the change reaches the app, and change the date below.

Last updated: 12 November 2026 · support [at] coffeebeansstudio [dot] eu