iOS Company Portal Security

Scenario: Colleague have installed the Company Portal and enrolled their personal device.  They then install an application through the Company Portal.  Any application that does not have the Intune SDK integrated.  It is understood that Application Protection will not be applied to the application without the SDK integration.

Question(s):

What is the level of security protection on this application? 

Would the data stored from the application be secured?

If the iOS restriction policy deemed that the transfer of information from the application to another unmanaged application be limited, would that be enforced?