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Privacy policy

Sum-thing: Math Link Puzzle · last updated 16 September 2026

The game has no account, no server of ours, and sends us nothing. Everything below is about one thing: the ads, which are served by the Google Mobile Ads SDK.

What we collect ourselves

Nothing. There is no sign-up, no profile, and no server belonging to us for anything to be sent to.

Your settings, your four high scores and the game you have in progress are written to a file inside the app's own private storage on your device. That file stays on the device, is not readable by other apps, and is deleted when you delete the app.

Ads

The free version shows a banner ad, served by Google's Mobile Ads SDK (AdMob). That SDK collects data directly, and Google is the data controller for what it collects. These are the categories Google documents, in Google's own words:

What Google collectsWhat it is used for
IP address, which may be used to estimate the general location of a deviceAdvertising, analytics
A device IDAdvertising, analytics
Other user product interactions, to improve advertising performanceAdvertising, analytics
Advertising data, such as advertisements the user has seenAdvertising, analytics
Non-user related crash logsApp functionality
User-associated performance data, such as app launch time and hang rateApp functionality

Google's own descriptions are at Google Mobile Ads data disclosure, and how Google handles that data is covered by the Google Privacy Policy and by How Google uses information from sites or apps that use our services.

Children, and why the ads are not personalised

This game is meant to be played by children — its easiest mode is built for ages 4 to 7 — so every ad request the app makes is configured before the ads SDK starts:

Nothing in this app is used for tracking as Apple defines it, and no data is sold or shared for cross-context behavioural advertising.

Leaderboards and purchases

The leaderboards are Apple's Game Center on iOS and Google Play Games on Android. Signing in is optional; if you do, your score and the identity you sign in with are handled by Apple or Google under their own privacy policies, not by us. Skip it and the game is fully playable offline.

The optional one-time Remove Ads purchase is processed by the App Store or Google Play. They tell the app only whether the item is owned. We never see your name, your card, or your billing address.

What we do not do

Your choices

Because we hold no personal data about you, there is nothing on our side to access, correct or export. For data the ads SDK collected, Google is the controller, and its privacy policy describes how to exercise your rights. If you are unsure, write to us and we will help.

Contact

Questions about this policy, or about privacy in the game: ypok.contact@gmail.com. We answer within two business days.

Changes

If this policy changes, the new version appears on this page with a new date at the top. A change to what is collected will also be described in the store listing release notes.