Cookie Policy
This page explains the cookies and browser storage used by Dead Cold Cards.
Current technologies
The current application uses Supabase authentication/session cookies so signed-in users can stay signed in and access their account features. These are treated as strictly necessary for the account service.
The application also stores a small number of preferences in browser local storage: card reveal animations, device-motion tilt, and market preference. These settings help remember how the interface should behave on the same device.
Current inventory
| Technology | Category | Purpose |
|---|---|---|
| Supabase auth/session cookies | Strictly necessary | Keep users signed in and refresh sessions. |
| Google AdSense advertising technology | Advertising, subject to applicable consent requirements | Display advertising on free, ad-supported surfaces when ads are enabled. |
| Stripe Checkout and Billing Portal storage/cookies | Payment and fraud prevention | Process subscription payments and billing management through Stripe-hosted surfaces. |
| tcg-tracker.cardRevealAnimations | Preferences | Remember card reveal animation preference. |
| tcg-tracker.deviceMotionTilt | Preferences | Remember device-motion tilt preference. |
| tcg-tracker.marketPreference | Preferences | Remember preferred market display setting. |
Analytics and advertising
Dead Cold Cards is prepared to use Google AdSense advertising technology on free, ad-supported pages when ads are enabled. Google and its advertising partners may use cookies, local storage, device identifiers or similar technologies, and may process personal data such as IP address, browser/device information, page interactions and advertising identifiers where applicable.
For UK, EEA and Switzerland traffic, advertising consent should be managed through a Google-certified consent management platform integrated with the IAB Transparency and Consent Framework. The intended setup is Google's AdSense Privacy & messaging CMP. That dashboard setup is separate from this application code.
Managing storage
Users can clear cookies and local storage in their browser settings. Clearing strictly necessary session cookies will sign the user out. Clearing local storage will reset device-level interface preferences.
Where an advertising consent message is available, users should use that message or its privacy choices control to update advertising consent. Browser privacy settings may also limit cookies and similar technologies.
See the Privacy Policy for more detail about providers and personal data use.