@seanbrogan
Unfortunately no, you can't test an unpublished app on the mobile device.
The only way that we do that is to save the app, then save the app with another name, publish it, test it on the phone. If issues need to be addressed, open the ORIGINAL app, make changes, save, then save with another name, publish, test. Rinse. Repeat.
Quite annoying I know, but this is the only method we've been able to use.
I hope this is helpful for you.