GravilinkGravilink

For questions, feedback, bug reports, or requests related to Gravilink, please contact us through the form below.

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Gravilink is a physics puzzle game where you guide balls to the goal by drawing ink lines and placing pins while interacting with stage gimmicks such as lasers, gates, switches, bumpers, portals, and gravity fields.

Gravilink stores game progress and custom stage data locally on your device using iOS standard storage. Community features use Firebase for authentication and community services.

• Cleared stage progress
• Play credit balance
• BGM, sound effect, and mute settings
• Custom stage data created inside the app
• Whether in-app guide dialogs have already been viewed

If you use community features, Firebase may process a Firebase user identifier, an anonymous authentication state, a user-entered display name, published community stage content, download records, report records, and block records for authentication, publishing, search, downloads, gameplay, abuse prevention, moderation, and feature operation.

A randomly generated public author identifier and your display name may be shown with stages you publish. Your Firebase user identifier, Apple name, and email address are not shown publicly. Firebase Authentication may process an email address supplied by Sign in with Apple for authentication, but the app does not use or display the Apple name or email address for community features.

• Firebase (Google): authentication, database storage, server processing, and App Check security
• Apple: Sign in with Apple and App Tracking Transparency
• Google AdMob: rewarded advertising and advertising measurement
• You can remove community data from Settings. Published stages are hidden immediately and permanently deleted after 30 days.
• Download and report records are retained for up to one year. Daily abuse-prevention limits are retained for up to 90 days. Block records remain until you unblock the creator or delete your community account.
• For moderation, deletion requests, or other support, please use the contact form.

Gravilink uses Google AdMob to load and display rewarded advertisements. Google may collect and process information such as device identifiers, advertising identifiers, IP address, approximate location, ad interaction data, and app usage data for ad delivery, measurement, fraud prevention, and related purposes.

Personalized advertising may be used when allowed by your App Tracking Transparency choice and applicable consent settings. If permission or consent is not available, non-personalized or limited ads may be shown.

Where required, Google User Messaging Platform displays a regional consent form before advertising is enabled. Gravilink may then request permission through App Tracking Transparency. You can manage tracking permission from iOS Settings and applicable privacy choices from the app.

• Google Privacy Policy: https://policies.google.com/privacy
• Google technologies used by apps and sites: https://policies.google.com/technologies/partner-sites

Gravilink offers a lifetime Premium Plan through Apple's StoreKit. Purchase processing, payment information, refunds, and purchase history are handled by Apple. The app only checks whether the Premium Plan entitlement is active in order to unlock premium behavior.

To improve stability and quality, Apple may provide crash logs and diagnostic information in an aggregated or non-personally identifying form, depending on the user's device settings. Gravilink does not use this information to identify individual users.

Gravilink does not knowingly collect personal information from children. If you believe that personal information has been provided unintentionally, please contact us through the contact form.

This policy may be updated when app features, third-party services, or legal requirements change. The latest version will be posted on this page.

Use of this app is subject to Apple's Standard End User License Agreement (EULA).

All original gameplay, stage data, artwork, sound, user interface design, and other intellectual property in Gravilink are owned by TN-House unless otherwise stated.