Thanks a lot! I did do some of these things (namely Reddit) and that worked well, just the number of places that allow posting is limited and I don't want to get too spammy. Will continue there.

Main conceptual issue I've been having with other marketing (e.g. influencer) is that there isn't a well-defined audience to market this to. Usually edtech targets students/schools and Periplus doesn't fit there too well. Need to find what works I guess.

I'll spend more time on it from now on :). Thanks again.

re: mobile playback controls -> on it