Privacy Policy

Last updated: 30 August 2026

Rush Builder (rushbuilder.dev) is a free, unofficial card viewer and deck builder for the Marvel Hero Rush trading card game. This page explains what data the site handles.

Data you create

• Your working deck and any decks you save are stored in your browser using localStorage. They stay on your device and are never sent to us or anyone else.
• When you share a deck, the card list is encoded directly into the URL you copy. No deck data is uploaded or stored on a server.
• Rush Builder has no user accounts, sign-in, or profile.

Card data

• Card names, stats, text and images are fetched through a server-side proxy from the Marvel Hero Rush card database. These requests carry no information that identifies you beyond the standard details every web request includes (such as your IP address, which our host, Cloudflare, processes to deliver the page).

Advertising

• Rush Builder uses Google AdSense to show advertising. Google and its partners may use cookies and similar technologies to serve and measure ads, and in some cases to personalise them based on your prior visits to this and other websites.
• You can review and control ad personalisation at Google My Ad Center and read how Google uses data at policies.google.com/technologies/partner-sites.
• Where required, you will be asked for consent to the use of advertising cookies before they are set.

Analytics

• Rush Builder does not run any separate analytics product. The only third-party scripts on the site are Google's advertising and consent tooling.

Your choices

• Clearing your browser's site data for rushbuilder.dev removes every saved deck and resets the site.
• Browser or extension ad blockers will prevent the ad and tracking scripts from loading; the builder works the same with them enabled.

Contact

Questions about this policy can go to the project Discord.