Hello Nick Xu,
Since RadChart and RadGauge are Silverlight controls and the iPad and iPhone do not have any support for Silverlight they will not run on those devices.
All the best,
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!