Privacy Policy

Last updated: November 3, 2026

crelve ("we") sets out this Privacy Policy (the "Policy") on how information about users is handled in the mobile application "Underday" (the "App").

1. Basic policy

• The App has no account registration and does not ask you to enter your name, email address, or similar information.
• Your game progress (items, run records, and settings) is stored on your device.

2. Information stored on your device

Information	Purpose
Game progress (items, run records, gem balance)	Continuing the game and displaying screens
Settings and usage (days played, onboarding completion, etc.)	Showing the daily dungeon and displaying screens

This information is deleted from your device when you delete the App.

3. Information collected by external services

The App uses the services below. What each service collects and how it is handled follows its own privacy policy.

Service	Main information collected	Purpose
Google Firebase Analytics (Google LLC)	App usage (screen views, feature usage counts, etc.), device type, OS version, app instance ID	Analyzing and improving usage
Firebase Crashlytics (Google LLC)	Activity logs at the time of a crash, device type, OS version	Investigating and fixing bugs
Google AdMob (Google LLC)	Advertising identifier (IDFA, only if you allow it), IP address, device information, records of ads shown and tapped	Delivering ads and measuring their effect
RevenueCat (RevenueCat, Inc.)	Purchase history, purchase status, an anonymous in-app user ID	Managing purchases and restoring premium features and items

Apple (the App Store) processes payments. We do not receive payment information such as credit card numbers.

4. Ads and consent

• The App may show ads. Which ads appear depends on what you have purchased, as shown on the purchase screen.
• In regions that require consent, such as the European Economic Area, the United Kingdom, and some US states, we ask for your consent through Google's User Messaging Platform (UMP) before ads are delivered.
• On iOS, we ask for permission through App Tracking Transparency (ATT) to use the advertising identifier. If you do not allow it, you can still use the App, and ads are shown without personalization.

5. Disclosure to third parties

Except for transmission to the external services in Section 3, we do not provide your information to third parties, unless required by law.

6. Children

The App is not directed to children under 13, and we do not knowingly collect information from children under 13.

7. Your choices

• You can change the use of the advertising identifier in iOS under Settings > Privacy & Security > Tracking.
• Deleting the App deletes all information stored on your device.

8. Changes to this Policy

We may change this Policy as needed. The revised Policy takes effect when it is posted on this page.