Good Info, Clunky UI – English Grammar in Use: Sample Review

I downloaded this onto my iPad Pro to help tune-up my writing. I studied writing several decades ago, and I'm starting to write for publication again. The information is good, but I work on my iPad Pro w/keyboard in landscape, and it's hurting my neck to keep turning sideways to read the info as this app only works in portrait (which means I don't use it). Also, as a visual person, I find the UI clunky, not beautiful like many other apps I use. If you're looking for grammar information, and work in portrait (and don't want a polished and fun UI), then this app is great.
Review by rpphoto on English Grammar in Use: Sample.