I have tried to use TheMercuryNews for years. I am a subscriber, but there are times when I want a quick look at the news. This is definitely one of the worst apps I have ever used. It jumps around. It flashes. The page moves up and down randomly. Scrolling doesn’t work, then it does, and sometimes it just runs away with the page. Obnoxious flashing ads dominate the pages, and change the size and shape of the text blocks. And never, ever try to use it on a slow wi-fi connection, because all that flashing and jumping uses network bandwidth, so it takes forever for the page to settle down so you might read it. Sorry Mercury news, I switched over to the New York Times mobile app several minutes ago.
I am using an iPad Pro with iOS 11.4. But TheMercuryNews has been this bad for years.