Unable to purchase complete bundle

The element program is wonderful and provides visuals and history and knowledge of the stuff the world is made of. My disappointment was when the App Store would not allow me to buy the 3 app bundle. I sent email to company and they have been slow to respond. It is frustrating that I tried to purchase the entire bundle and it only downloaded the element app. I hope its not some incompatibility to iPad Pro or the latest iOS. I was also noticing the 3D ability would glitch and only rotate one of the two images, so it would pop in and out of 3D. The images would not turn in synchronization and even freeze. Minor issues I hope they get resolved.

R3bdo about The Elements by Theodore Gray, v2.0.6