This app was mentioned in 3 comments, with an average of 3.00 upvotes
They also have an app called Sveriges Radio Play. It's available for Android, I don't know about IOS, but it probably is too. I think you can also download what you want to listen to, so it's good to listening in the bus without internet.
I used the Sveriges Radio app to practice during a road trip. Connected it to the bluetooth in my car and just listened to "P4 Stockholm" live. You can also listen to previous programs on it.
Yeah, the official app is Sveriges Radio Play. You can listen both live and to podcasts.