Horrible app

This app tends to put a fat advertisement in your face literally every sixty seconds of the time you are trying to count important numbers. For goodness sake, stop ruining the experience. I seriously will pay money to rid this annoyance. I have never had such a app in my life, it gets worse. The developers are scamming me and I know i. I am seeing not a single advertisement at times, and I click a button, and a advertisement website is automatically loaded. I really want apple to investigate this because this looks like illegal tampering to me

Stayturnt about Calculator Pro+ for iPad, v5.1