Slidekin Privacy Policy
Last changed: 7 October 2026
Slidekin is a puzzle game for Android by Grut Hiem Games. This page explains what data the game uses, why, who else gets it, and how you can delete it. We keep it as small as we can: most of the game works without anything leaving your phone.
Who we are
Grut Hiem Games, the Netherlands. Contact: grut.hiem.games@gmail.com. We are responsible ("controller") for the data described here.
Short version
| What | Where it goes | Why |
|---|---|---|
| Your progress, settings and own levels | Only on your phone | To play the game |
| Whether you are under 13 (not your birth year) | Only on your phone | To show the right ads and protect children |
| Device and ad data | Ad networks (Google AdMob and partners) | To show ads (personalized only with your consent, never for children) |
| Purchases | Google Play; a purchase code to our server for the Creator pass | To sell and check purchases |
| Play Games player ID, the levels you share, plays, votes and reports | Our server (Supabase, EU) | For the online level maker, only if you sign in |
| A problem report | Our e-mail, only when you send it | To fix the problem |
We do not use analytics or tracking tools of our own, and we never sell your data.
On your phone
The game keeps your progress (stars, loot, shells, clothes, hints), your settings, the levels you build, and a small log of the last errors on your phone. It is not backed up to Google and is not sent to us. If you uninstall the game, it is gone. Purchases come back from Google Play.
The age question
The first time you start the game, it asks the year you were born. We keep only one thing: whether you are under 13. Your birth year itself is not stored, and the answer never leaves your phone. A parent can change the answer later under Options → Change age. Players under 13 (and players whose age we don't know) get child-safe ads and need a parent to sign in online (see Children).
Ads
Slidekin is free and shows ads: sometimes a full-screen ad after a won level, and optional video ads you choose to watch for a reward. Premium removes the ads that you don't choose.
Ads come from Google AdMob, which can also fetch ads from Unity Ads and Liftoff (Vungle), and, for players of 13 and older, from AppLovin. These ad networks receive information about your device (such as the model, operating system, language, rough location from the IP address and the advertising ID) to show ads, count them and prevent fraud.
- Consent. In the EEA, the UK and Switzerland the game asks for your consent first (Google's consent form). Without consent, ads are not personalized. You can change your choice any time under Options → Privacy choices.
- Children. For players under 13, or when we don't know the age, ads are never personalized, are marked as child-directed, do not use the advertising ID, and only come from ad networks that Google has certified for families.
Their privacy policies: Google, Unity, Liftoff, AppLovin.
Purchases
Purchases go through Google Play. We never see your name or payment details. When you buy the Creator pass, the game sends the purchase code to our server, which checks it with Google so the pass works online.
The online level maker
Building and playing your own levels works without an account. To share levels, play other players' levels or vote, you sign in with Google Play Games. Our server then stores:
- your Google Play Games player ID (to recognize you; we do not store your gamertag or e-mail address),
- the levels you share (the map, its name from our word list, the theme) and when,
- which shared levels you played, whether you won and in how many moves,
- your thumbs up or down, the levels you reported, and makers you chose to hide,
- whether you have the Creator pass and accepted the sharing rules.
Other players see your shared levels with a made-up maker name (like "Sleepy Otter") and the play and vote counts. There is no chat and no free text. If a level is too complex for our solver, the game sends us its map so we can improve the solver.
The server runs on Supabase in the European Union (Frankfurt). Data stays until you delete your account. Encrypted backups are kept for 14 days, so deleted data is gone from them within 14 days.
Children
Slidekin is made for everyone, including children. For players under 13:
- ads are child-directed and never personalized (see Ads);
- signing in online needs a parent to hold a button for 3 seconds, after a reminder never to put personal information in a level;
- shared levels show a made-up name, never a real name or gamertag;
- sending a problem report also asks for a parent.
Parents can ask us to see or delete their child's data at grut.hiem.games@gmail.com, or delete the account in the game.
Problem reports
Under Options → Report a problem the game can open your own e-mail app with a report: the game version, Android version, phone model, language and the last error lines. Nothing is sent unless you send that e-mail yourself. We only use it to fix the problem and delete it afterwards.
Legal basis
We use the data for the online level maker and purchases because you asked for those features (contract), personalized ads only with your consent, and non-personalized ads, fraud prevention and problem reports for our legitimate interest in running a free game.
Your rights
You can ask us to see, correct, export or delete your data, or object to how we use it. Mail grut.hiem.games@gmail.com. You can also complain to the Dutch data protection authority, the Autoriteit Persoonsgegevens.
Deleting your data
In the game: Options → Delete my account. Or see how to delete your account. Everything on your phone goes when you uninstall the game.
Changes
If we change this policy, the date at the top changes.