When I was travelling last year I used the nap / sleep mode a bit and I found it did help if I was finding it hard to sleep.
Of course this is totally subjective so your mileage may vary.
Wish I had thought to listen to sleep mode last night between 3 and 6 AM while I was tossing and turning in bed.
As someone mentioned below, I could put together a Spotify list but why? Brain.fm does the job and I don't need to.
When I need to focus, my two choices are Brain.fm or "Ok, Google. Play some downtempo ambient chill instrumental". The latter oftentimes distracts me. The former doesn't.
I was having some technical difficulties with the site (not the apps) a while back. The head of the company was helping me to debug the problem. Great customer service. Turned out it was something on my end.
I too landed the lifetime subscription.
Highly recommended!
Because I already pay for spotify?
Brain.fm does "work" in that it definitely has helped me focus, but I think one could craft a Spotify playlist manually with some effort in order to achieve a similar effect.