Thank you! We were waiting to see how Crosswalk developed before publishing to Android, but I think we are going to go ahead and publish using CocoonJS within a month or so. We absolutely need the orientation lock and at the time Crosswalk was announced on these forums (5 weeks ago or so?) we tried an export and didn't see much of a performance difference. We know it is still improving and will ultimately be the better choice.
For our Lite version we only allow the very basic profile information to be saved (Name, grade, font). The meaningful stuff like Known Letters and Known Words is reserved for the paid version. In addition, assessments are not available in the Lite version. These assessments track a history of progress made by the child.
Thanks again for commenting and I wish you luck in creating your educational apps. Did you have something specific in mind?