When talking about "apps" one should always ask the question: "What does the app DO?" I haven't tried the RT app, but I'm interested in what it does, and which advantage does it bring to users that can't be had via a regular browsing (in the standard browser) of the RT web page. Many companies publish "apps" just to create a 'modern' image of themselves and to increase 'customer/reader loyalty', or because they gain something else from it (injecting ads, data collection, etc.) Most such "apps" are just yet another, special browser where you don't have to enter the URL, and which display the content in a larger font size or differently arranged, but they don't DO anything.
Rephrasing for Sott: What would be the advantage for people to use a Sott app that can't be had via regular browsing of the web page?
Making a Sott app is possible, but it would be a huge time and energy drain for those making and maintaining it. If there are good reasons to do so, it's worth it, otherwise not. IMO.