Kendo UI Web and Kendo UI Mobile have different purpose, design paradigms and widget sets. If you develop and Kendo UI Web application, it will work on iOS, but migrating such an application to Kendo UI Mobile will not be that straightforward, due to the abovementioned reasons. If mobile users are important in your case, you can consider implementing a mobile friendly web application (e.g. use lighter pages), or have a separate mobile application.
Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI