It may very well be a problem with the app itself. I hold my iPad in landscape myself. It's very unnatural and uncomfortable to hold it in portrait and I won't download nothing that won't switch to landscape. If I do download something and it turns out it's in portrait, it comes right off and I won't use it. I even have my device locked in landscape in the position I hold it. Somethings that go into landscape go in upside down and you must rotate your device, those apps also come right off and I won't use them either. This is the rule weather on iPad or smart phone, I hold my device only one way which is natural for me and very comfortable. I just don't like a cramped screen, which is why landscape is my thing. Right now I use an iPad, this is more comfortable for me and I want all of my apps to switch to landscape or they won't be on here
Apple, will you please consider making all apps switch optionally to landscape and not just portrait? To many times I check the app preview only to find out it's only portrait mode, and even after I get it on my device, same thing, I won't switch to landscape. I have my device purposely locked in landscape for a reason and I want my apps that I choose to have in landscape