Privacy Policy
Rolling Hit (롤링히트)
Last updated: October 3, 2026
GonggamStudio ("we", "our", or "us") operates "Rolling Hit" ("App"), a squishy curling and bottle cap flicking game.
This privacy policy describes what information the App collects and how it is used and shared.
The App has no sign-up process. To save your game records on our server, an anonymous account is created automatically the first time you open the App, without your name, email or phone number.
If you wish, you can link a Google account (Android) or an Apple account (iPhone·iPad) to keep your records when you change devices. The App has no nicknames or rankings.
1
Information We Collect
We may collect the following data:
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Anonymous account identifier – a random value created by our server the first time you open the App (not your name, email, phone number or device serial)
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Game records – Gold and Star Coins, hearts, character experience, collected pieces with their upgrade levels, upgrade materials and wildcards, your deck and equipped cap, draw records (pity count, free draws used today), login streak, mission progress, Daily Challenge results, and match records (mode, opponent, AI level, start and end time, Gold earned, and totals such as wins and matches played) – sent to our server so that currency and rewards are calculated and your records are kept on the server
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If you play 2v2 with a Friend: the room code, the identifiers of the two accounts in the room, your deck, equipped cap, the upgrade levels of those pieces and your heart count, and your throws during the match (direction, power, spin, chosen piece) with the positions of pieces on the board – used to open the room and keep both devices' matches in sync
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If you link a Google or Apple account: the email address and account identifier of that account – for sign-in and account verification (we never receive your password)
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App instance identifier, app interactions (usage statistics such as match results, creating or joining a friend room, and account linking), crash logs and diagnostics – collected by Google Firebase (Analytics and Crashlytics)
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Device identifiers such as the advertising ID, approximate location (based on IP), app interactions, crash logs and diagnostics – collected by Google AdMob when ads are shown in the App
2
Information Stored Only on Your Device
Sound, vibration and language settings, and whether you have seen the how-to-play guide, are stored only on your device and are never sent to our server.
A copy of the game records received from our server is also stored on your device so it can be shown when you are offline.
If Google backup is turned on for your Android device, these records may be included in your device backup.
3
Why We Collect This Data
We use this data only to:
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Run the game – calculate and save currency, pieces, upgrades, draws, login streak, missions and Daily Challenge rewards on our server, and block abnormal records
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2v2 with a Friend – open a room with a friend using a room code and keep both devices' matches in sync in real time
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If you link an account, restore your records when you change devices or reinstall the App
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Find the causes of app errors and improve game difficulty and balance (Google Firebase)
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Serve ads, measure ad performance and grant rewards for rewarded ads via Google AdMob
4
Data Sharing and Processors
We do not share your data with any third parties except:
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Your friend in the same room – when you play 2v2 with a Friend, the other player in the room can see your deck, equipped cap, the upgrade levels of those pieces and your throws during the match (your email and account identifier are not shown)
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Supabase (server hosting) – stores and processes your account identifier, game records, friend room information and real-time match messages, and, if you link an account, your email address
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Google · Apple (account linking) – handle sign-in with the account you choose; we never receive your password
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Google Firebase (error reporting and usage statistics, as a processor) – app instance identifier, app interactions, crash logs and diagnostics
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Google AdMob (ads and ad personalization) – device identifiers such as the advertising ID, approximate location, app interactions, crash logs and diagnostics
5
Retention
Your account and game records on our server are kept until you delete them.
Match records and daily and weekly mission records are deleted automatically after 40 days, and monthly mission records after 70 days. Friend room information is deleted one day after the room is created, and throws during a match are not stored on our server; they are only passed between the two devices.
Retention when switching accounts: If you link a Google or Apple account that you already used on another device, you choose between "Current progress" and "Account progress". The game records you did not choose, together with the records of the guest account being cleaned up, are kept on our server for 30 days so they can be restored on request if you chose by mistake, and are then deleted automatically by a daily cleanup. They are not used for any other purpose while kept, and no new information is collected. If you delete your account, any retained records related to that account are deleted immediately as well.
Once deleted, data is removed immediately and cannot be restored.
6
User Rights
You have the right to:
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Delete your server account and all game records with "Settings → Delete account" in the App
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Reset or delete your advertising ID, or opt out of personalized ads, in your device settings (Settings → Google → Ads)
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Change whether the App may track you in your iOS settings (Settings → Privacy & Security → Tracking)
7
Data Deletion
Tapping "Settings → Delete account" in the App immediately deletes your account and game records on our server (currency, pieces, upgrades, missions and match records, including the email of a linked account), and you start over as a new guest. Deleted records cannot be restored.
If you use the same Google or Apple account in other GonggamStudio apps, the records and sign-in of those apps are not deleted.
If you have already deleted the App, email us with the email address of the Google or Apple account you linked using the button below. We will delete it promptly after checking.
✉ Send email
8
Security
All communication between the App, our server and ads is encrypted over HTTPS.
9
Policy Updates
If this policy changes, we will post the update on this page and update the date above.
We recommend checking this page regularly.
10
Children's Privacy
This app is not primarily directed at children under the age of 13.
We do not knowingly collect personal information from children under 13.