I am not sure, it won't be enough IMO if the icon in the Tray is not changing to a clear Recording icon. It would be like on my phone the big red End Call butt

I am not sure, it won't be enough IMO if the icon in the Tray is not changing to a clear Recording icon. It would be like on my phone the big red End Call button would not end the call, just minimize the app and put a small gray icon on the top-bar section.