There isn't much we can do to implement debugging in Ion. Right now your best bet is to sprinkle your JS code with console.log calls and these will show up in the device's tab in the Output pane in Graphite. Alternatively, you can view Ion's output in the device console in iPhone Configuration Utility
Or, if you're part of Apple's iOS Developer Program, you can use Graphite to build and deploy your app on an iOS 6 device (not in Ion, but an actual app) and use the iOS 6 Remote Web Inspector in Graphite to debug your app.
It could be possible that the file paths you use in your app do not match the correct case. The filesystem in iOS is case-sensitive, whereas the Android filesystem and the Simulator are not. We recently heard about such a problem
All the best,
the Telerik team
Share feedback and vote for features on our Feedback Portal.
Want some Kendo UI online training - head over to Pluralsight.