the BBC radio app on iOS and android is a jewel. i open it, press play, and within a second it starts the live or on demand stream.
for a while now the app launches with a notification that it will be abolished soon, because of its migration into the more modern app named BBC sounds.
nothing against it. the sounds app looks much more organized here on my iPad. but the outstanding advantage of the (soon) legacy radio app is missing: instead of starting the stream in a second or two (right image), it takes 20 seconds until a sound is heard.
UPDATE: since the last update (mid september 2019) the response time has improved.