AR CITY is Japan’s first use case of AR cloud application, and IT was originally developed as an iPad experience. The key feature of AR CITY is simultaneous AR experience of multiple users. This functionality caught attention from companies and event organizers, and we decided to improve this functionality and re-develop AR City as a cross-device AR experience. The implementation of cross-device functionality in AR City helped us broaden and deepen our knowledge of bridging multiple AR platforms and devices. ALSO, this led to the development of CONEKTON, MESON’s own AR framework.