Beware – U.S. History Trivia - American History Quiz Review

Downloaded the app. Only two subjects can be accessed. So I purchased the others for $3.99. Now it lets me go for about 20 questions then blanks out. Also even though it auto loaded on my wife's iPad, she would need to pay the $3.99 to access the extra subjects as well even though we have the same account! Tried to go to the app website which is just a Facebook page, which we don't subscribe to.
Review by Old Blood & Guts on U.S. History Trivia - American History Quiz.