Duel Studio launches iOS deck app

Duel Studio’s iPhone launch looks less like a new game release than a mobile extension of a fan-built tool that was already serving Duel Masters players on the web. The service behind it, Duel Studio Classic, describes itself as an unofficial tool for deck construction, card search and solo testing for the Duel Masters “Classic” format. A Sept. 7 post from the developer’s X account said the iOS app was available and linked users to the App Store and support resources. The app matters because it gives Duel Masters players on iPhone a portable version of functions that were already central to the browser product. Duel Studio’s English getting-started guide says users can build and save a 40-card deck, check regulation badges and test decks in Solo Play. The site also says guest mode is available without registration. ### So what exactly is Duel Studio? (x.com) Duel Studio Classic says on its website that it is a free, unofficial tool built for the Duel Masters Classic environment. The Japanese-language “about” page says it is aimed at deck building, card search and solo play for a fan-supported Classic format rather than an official publisher-run platform. The operator page adds that the project’s purpose is to support research, deck construction and play preparation for Classic rulesets including Basic, 05, 08 and 1405. (duel-studio.com) That places the iPhone app inside an existing rules-and-testing ecosystem rather than as a standalone mobile card game. ### What can iPhone users do in the app? The clearest verified feature set comes from Duel Studio’s own web documentation. (duel-studio.com) The English guide says users can start as guests, assemble a 40-card deck and test it in Solo Play, while the main site says the service covers deck construction and card search. A separate account-deletion page shows that Duel Studio now maintains mobile-app account management flows, including in-app deletion and a web fallback if the app cannot be used. (duel-studio.com) That is a concrete sign the iOS release is being run as an ongoing app service, not just a one-off upload. ### Is this an official Duel Masters product? Duel Studio’s own description says no. (duel-studio.com) The website repeatedly identifies the service as unofficial, and frames it as a fan tool for players using the Classic format. That distinction matters for users looking for tournament or card-database support. Duel Studio appears to be built around community play preparation and deck research, while official Duel Masters digital products are separate. (duel-studio.com) Google Play listings for Duel Masters PLAY’S, for example, identify that app as the franchise’s official mobile game presence in Japan. (duel-studio.com) ### Why does the iPhone release matter to international players? The English-language getting-started guide is one clue. Duel Studio published an English walkthrough in June and updated it in August, describing how to build and test decks through the current interface. That suggests the project was already trying to serve users beyond a Japanese-only audience before the iOS launch. (play.google.com) The Sept. 7 social post is another. By posting App Store and support links publicly, the developer signaled that onboarding and troubleshooting were part of launch-day distribution, not an invite-only rollout. ### Where do users go next? Duel Studio’s support trail now runs through its own website. The service has published pages for FAQs, privacy policy, credits, operator information and account deletion, all updated or crawled recently. (duel-studio.com) As of September 8, 2026, the practical next step for users is to install the iPhone app from the App Store link shared by Duel Studio and use the linked help pages for setup, guest access and account management. (x.com) (duel-studio.com)