I liked these, along with Perfecto Podcast and a few others, but then I found Deep Sunset House and Progressive. I liked it even better, in large part because they don't interrupt the music with talk of their latest show etc.
brain.fm seems to work for me, so I bought a lifetime subscription back when it was available, but the iOS app is flaky enough that I don't use it that often. I don't understand what the "AI" is doing for me, but it makes the experience worse. I'd rather have a static set of music files that are in the app so that I can play them offline (e.g., while traveling). Or even better, not in the app so that I can put them into a music player. The app does have an offline mode but it's awkward.
I recently learned Pzizz (which is nice for sleep) added a focus mode. I should try that sometime. Their app is much more reliable than brain.fm's app. However they don't have a lifetime purchase option, and I almost never sign up for subscription services, so I'm only using the free version.
- Markus Shulz Presents Global DJ Broadcast - Above and Beyond: Group Therapy
There are many more, these two are my favorites.