Good features, but disappointed – TapTyping - typing trainer suite Review

I bought your app cos I thought it looked impressive and had good quality. While the features are nice, two problems: 1. keeps lagging and crashing, even on my iPad Air 2. No heat map! I'm serious, I don't see it anywhere, no matter which keyboard I'm using. I think it's to do with iOS 8, and I hope you fix the compatibility issues in the next update. Thanks.
Review by Jonapedia1 on TapTyping - typing trainer suite.