Cant get full version on iPad

I paid for the full version on my iPhone, but its not communicating that to my iPad. My son LOVES this app, so Ill give it five stars when I can get it to load on my iPad without paying again.

MamaPajama2468 about My First Puzzles: Alphabet - A Free Educational Puzzle Game for Kids and Toddlers for Learning Letter Shapes - Kid Toddler App