Privacy Policy
Earth Defense
Last updated: September 29, 2026
GonggamStudio ("we", "our", or "us") operates the Earth Defense mobile game ("App").
This privacy policy explains what information we collect in the App and how we use, keep and delete it.
1
Information We Collect
We collect the following information:
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Account information – a guest account ID created automatically when you first open the App. If you link a Google or Apple account, that account's identifier and email address
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Nickname – if you set one
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Game records – progress, currencies, Dev Center and research status, attendance/mission/achievement records, run results, ranking records
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Friend records – friendships, gifts sent and received, invite code usage
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Purchase records – Google Play / App Store order ID, product and purchase time
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Device information – a random device value created by the App, a notification token if notifications are on, and the advertising ID
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Ad reward verification – your account ID and the ad transaction value, used to confirm that a rewarded ad was watched to the end
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App integrity verdict – Google Play's verdict on whether requests come from the genuine App on a genuine device
2
Why We Collect This Data
We use this information only to:
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Save your game progress and restore it on a new device
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Verify purchases, deliver purchased items and process refunds
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Provide rankings, friends, mail, coupons and invites
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Confirm rewarded ads and serve personalized ads (Google AdMob)
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Prevent abuse (record tampering, payment abuse, etc.)
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Send announcements and event notifications (if notifications are on)
3
Processors and Data Sharing
We use the following services to process data and do not share it with any other third party:
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Supabase – authentication, storage of game and purchase records
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Google – sign-in, Google Play billing and app integrity, Firebase Cloud Messaging (notifications), AdMob (ads)
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Apple – sign-in, App Store billing (iOS)
4
Data Retention
We keep your data while your account exists and delete it as follows:
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When you delete your account – the account and game records are deleted immediately
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Purchase records – kept for 5 years in a form that cannot identify you, for refunds and accounting, then deleted
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Abuse-check records – deleted after 90 days
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Ad reward verification records – deleted after 30 days
5
User Rights
You have the right to:
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Access and request correction of your data
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Turn off notifications (App options)
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Delete your account and data
6
Account/Data Deletion
Delete in the App: App → Options → Delete account. Your account and all game records are deleted immediately.
Request without the App: Email us using the button below with your in-game nickname (or the email of your linked account). We will delete it within 7 business days.
✉ Send email
Deleted accounts and records cannot be restored, and purchased items and active passes are lost.
7
Security
All communication is encrypted (HTTPS), and game records and currencies are managed on the server so they cannot be changed by tampering with the device.
The database is protected with per-account access rules.
8
Policy Updates
If this policy changes, we will post the new version on this page and update the date above.
9
Children's Privacy
This app is not intended for children under the age of 13.
If you are under 13, do not use this app or submit any information.