When Nephele has a terrible freshman year, she does the only logical thing for a math prodigy like herself: she invents a time travel app so she can go back and do it again (and again, and again) in this funny love story, Groundhog Day for the iPhone generation. Fourteen-year-old Nephele used to have friends. Well, she had a friend. That friend made the adjustment to high school easily, leaving Nephele...