I dissagree eith the premise of the other comments. The reason some third party hasn’t made a universal app, is because it isn’t profitable at the moment. As there are more and more apps on the market, people will be more willing to pay for something like that. As a programmer, I know that it wouldn’t even be hard to create. You just send a signal from the stock app, record it with something like wire shark, and replay it. There are some more complicated methods they can use, but there will always be workarounds, if someone has the will, and money.