Why do the ads still up here after I have purchased the full version? – Calculator HD Pro Review

Unless I’m doing something wrong?????? I purchased the full version of the calculator pro and when I open the application on my iPhone 12 Pro Max, the ads still appear. The only way the ads disappear, is if I go back to the App Store and open it from there then the ads disappear. What is the fix for this? I tried downloading again and still the same thing. It’s like I get the ads even though I paid for the full version and I get the full version without the ads, only if I open it through the Apple App Store. This is not good. However, I really do like this calculator pro app. I just can’t stand the advertisements especially since I’ve paid for the full version........ Developer, please provide a quick fix for this, as I really like this Calculator Pro app. But I need to get explanation for this and a quick solution please.
Review by P.A.R.K.E.R. on Calculator HD Pro.