If they design the app to use the oldest possible version of Android they may not be able to use the most modern usability and security features.
“If they design the app to use the oldest possible version of Android they may not be able to use the most modern usability and security features.”
Sure they can, it is actually the opposite. The problem is older versions might not “let them track everything you do” like the newer versions will. Well they should not be doing that to their customers anyhow...