Good app needs rewards – Number Bonds: Addition & Subtraction to 99 Review

This is a great little app for teaching children number bonds. Very cute with four different game options and good control over settings, etc. However, this app really needs rewards/incentives to break up the learning and keep them interested. For example, many games allow a child to pick a "sticker" for every 5-8 problems they answer correctly. Please update this app with that feature!
Review by Nayla C on Number Bonds: Addition & Subtraction to 99.