Apple introduced 57 apps for iPhone Duo. No Japanese local apps were named in the list, and progress on Japanese-language support remains uncertain.
Apple listed 57 apps and games for iPhone Duo, including those covered in overseas reviews, and presented their support timing by country and region. Only 7 apps had a timing specified in the article, while the rest were expected to be added after launch. Apple's own apps were excluded, with categories including entertainment, work, gaming, shopping and travel.
No Japanese names appeared as local apps in the Japanese version, and no names corresponding to local apps were listed on the Japanese App Store. GarageBand and TestFlight were said to have been updated for Duo support in the early hours of 23 October Japan time. Another report said that Deck-Man, now Deck-Man+Cassette Player, was available in Japanese for ¥800.
As a way to identify Duo-compatible apps, the article explained that an App Store product page may display a “Made for iPhone Duo” badge. The badge is applied to apps that have published screenshots showing the Duo-oriented display, providing a clue for checking compatibility. It was also noted that Duo works regardless of whether the badge is present, although the way the display expands differs.
Overseas reactions included comments pointing to delays in support and views that confusion could arise on the first day. Apple also said that “more apps are coming,” raising expectations for additional updates. Follow-up support in Japan remains uncertain at this point, but regularly checking App Store updates is considered useful.