Information we process
Depending on the features you use, DM Value may process:
- Google account identifiers, email address, profile name, and sign-in status;
- your chosen player name, deck lists, deck posts, and account settings;
- online match room state, actions, results, and technical synchronization data;
- chat messages sent in online rooms and solo-play notes stored through the application;
- basic request, error, security, and operational logs created by the hosting environment.
Google and Firebase sign-in
DM Value uses Google Sign-In and may use Firebase Authentication or related Google/Firebase services in the deployed configuration. These providers process sign-in information under their own terms and privacy policies. DM Value receives only the account information and tokens needed to authenticate you and associate your saved data with your account.
Local card images stay on your device
Images you import through Local Asset Mode are read and processed in your browser. They are stored only in browser storage on your device and are not uploaded to DM Value servers. Clearing site data, changing browsers or browser profiles, or removing local images in Settings may delete them.
Cookies and browser storage
- Cookies
- May be used for secure session handling, authentication, and essential request protection.
- Local Storage
- May store lightweight interface preferences, selected options, or temporary client state.
- IndexedDB
- May store larger browser-local data, including user-imported local card images. IndexedDB content stays in the current browser profile unless you export or otherwise share it.
Advertising and Google AdSense
DM Value may use Google AdSense to support the service. Google and other advertising vendors may use cookies, web beacons, IP addresses, device or browser information, approximate location, referrers, advertising identifiers, and information about ad impressions or clicks to deliver, secure, limit, and measure advertising. Advertising remains disabled until the relevant Google review and technical setup are complete.
Third-party vendors, including Google, may use cookies to serve ads based on a visitor's previous visits to DM Value or other websites. Where permitted and selected, advertising may be personalized. Visitors can manage Google ad personalization through Google Ads Settings. Learn more about how Google uses information from sites that use its services.
For visitors in the European Economic Area, the United Kingdom, or Switzerland, DM Value uses a Google-certified consent management platform when Google advertising technology is active. The consent message provides choices about cookies, personal data, and personalized advertising before applicable advertising is requested. DM Value does not place advertising inside the duel table or beside gameplay controls.
Why we use information
We use information to authenticate users, provide decks and matches, deliver chat, synchronize game rooms, protect the service, investigate errors or abuse, and improve the Public Beta.
Sharing and retention
Data may be processed by infrastructure, authentication, database, security, and hosting providers only as needed to operate DM Value. We do not claim to sell personal information. Public deck posts, player names, room details, match state, and chat messages may be visible to other users as part of the feature you choose to use.
Beta data is retained only for as long as reasonably needed for service operation, security, troubleshooting, legal obligations, and abuse prevention. Retention periods may change while the service is in beta.
Your choices
You can use an available advertising consent message and Google Ads Settings to manage advertising choices, clear cookies and browser storage through your browser, remove local images through Settings when available, and stop using online or chat features. To request access, correction, or deletion of account-linked data, use the Contact page.
Security and international use
We use reasonable safeguards, but no beta service or internet transmission is completely secure. DM Value is primarily intended for use in Japan. Service providers may still process information in other countries, subject to provider locations and applicable law.
Policy changes
We may update this policy as DM Value changes. The updated date at the top of this page identifies the current version.