Math Practice Pro - Addition, Subtraction, Multiplication, Division, Tables, Square root, Cube root fun game for kids and young ones App Reviews

Everytime I try to change the number of flash cards to be more than 10 it freezes on me. Also under "Learn" all it does is provide tables to look at. Thats no different than having them on paper. Emailed about the glitch and email was returned undeliverable. Asking Apple for a refund.