I am not sure to have completely understood. But if the problem is only to rewrite the Prompt_like() function of the user application, I am ready for my own app. Perhaps most of us are ready too.
That is unfortunately just a tip of iceberg. Worse, as Run (and Execute) does not exist, you cannot write
I see huge advantages (both economics (no needs to own Mac & iOS device) and time saved (no new programming language)) that widely compensate the troubbles to rewrite the code of existing apps. Of course for a new app the problem does not exists.