Good job on this! It feels very complete, I can ditch at least 3 other applications because Soundly has features for meditation, sleep and focus.
I've been using soundly for several months now, almost daily for focus music as well as meditative background music while I'm in airports, transit, etc. Soundly provides a sound track for my life. :) The playlist feature also allowed me to make an audible POMODORO feature, where the sound changes after 24 minutes to a 5 minute break sound and then back, this has been a game changer for productivity.