Total battery and data drainer and no response to emails.

Tried to email, AGAIN, with no response. Beware before buying.
I have written before four times with no response. I have made my app review known in the App Store. I will continue to do so until I get a response of why the chess app drains my iOS battery and just takes up all when I am not even connected to the Internet on my iPad. My iPad always shows 49 percent of battery usage when I play this game. If I play on my iPhone I have the same and it uses about five gigs of data in about a week. Can you tell me why this is happening.
Thank you
Again my fifth request.

Snake16lv about Chess Premium, v1.65