Recently, Turnitin announced an iPad app called Grade Anywhere which would allow instructors to use the GradeMark tools on the iPad. Unfortunately, the new app is not integrated with Penn State single sign on, so Penn State instructors are not able to use the application at this time.
As an alternative, instructors can log in via http://turnitin.psu.edu/ and use some Turnitin services on the Safari or other mobile browser. Supported services there include class and assignment set up, basic review of originality reports and basic review of past graded assignments.
The sign in issue has been reported to the Turnitin help desk. Additional questions can be sent to firstname.lastname@example.org.