Adding radio custom URLs in TuneIn (new) now that the legacy version is gone in the new controller

This is mindbogglingly frustrating. The whole reason I had added some custom radio stations was to avoid TuneIn because I got totally  sick and tired of the advertisements and then annoying “TuneIn” chime at the beginning. As I do this for stations that TuneIn has in its repertory, the advertisements come back. Ugh! 

Is there a workaround that does not involve TuneIn?

The TuneIn iOS app doesn’t accept my custom url for a premium station so I can’t add it to Sonos. Their support says it’s a known problem which seems to only impact the iOS app. 
 

Doesn’t help that my MacBook which had the Sonos app on it gave up the ghost so I can’t try through that route. 
 

Thank you starflyergold for the detailed instructions, but it doesn’t work for me: On iOS TuneIn I can see my new (manually added URL-based) radio station, but in the (updated) iOS Sonos app, no (nor on the TuneIn website).  I get some really annoying defaults “From the Mind of Garth Brooks”, “Featured Collections” from MLB and Boss radio, etc. etc.

Really driving me mad!

Don’t worry, we just use TuneIn as a way to custom URL.

There is no advertisements or chime with this method.

Thanks.  But how do I find the custom URL (in my case for DI.FM) ?  I can’t find it anywhere !

here: https://www.di.fm/settings
Under HARDWARE PLAYER SETTINGS
You select your channel and quality, then you copy paste what in the box under playlist and you past it in TuneIN BUT maybe it's only for premium (what I’m) Don’t know if you have access to that in the free version of DI.

From what I can tell, the “new” TuneIn service inside of Sonos only displays a partial list of Favorites saved in the standalone TuneIn app. 
 

I too lost access to all of my custom URLs in the new app. I’d tested the work around above and while you can save a custom URL to stand alone TuneIn, it will only display in Sonos in “new” TuneIn if you reorder your list of Favorites in the stand alone TuneIn app so that any new custom URLs are high enough in the list so they can displayed in the partial list in Sonos.

I didn’t count how many are carried over. I don’t know why TuneIn doesn’t let Sonos display your entire favorites list, but for me it doesn’t. 

I was wondering, since the old radio stations are still visible in the current desktop app and it was stated that the stations are stored in your Sonos account...

Does that mean that when you're re-adding those stations to the new Tunein app, these stations are stored twice in your Sonos account? Or are the new ones stored at Tunein?

From what I've read I think they're stored at Tunein, and that would make the Sonos system even more dependant on a third party than the old version of Tunein. Why is Sonos doing this?

On a related note, since today I notice that the old Tunein service keeps disappearing from my desktop client. I can re-add it without error, but after a couple of hours it disappears again.

And on top of that, in my list of custom radiostations there are around 50 which are now missing from the top of the list, so stations starting with A, B, C, and some that started with D.

It looks to me Sonos is doing some stuff on their backend, but so far I'm not happy with what's happening.

Any one else experiencing this?

I haven’t a clue what Sonos is doing but it’s not good.

Like on your case, my “legacy” TuneIn disappeared from the desktop app. I tried to reinstall but it soon disappeared again.

l gave up trying to reinstall.

I can only see it using SonoPhone, a 3rd party iOS app, however, all of my favorites are gone from Legacy TuneIn and  only a partial list is showing in new TuneIn.

However, using this app, I can see many (not all) of my removed favorites under “Favorites”. These don’t show up in the new Sonos app on iOS or Android.
 

The new TuneIn app doesn't even work on my desktop client. I wish Sonos would prioritize fixing existing stuff that doesn't work, before implementing new non-working stuff...