need to pay a subscription fee to resume play
In order to save the location of the audio, you were listening to to use it as an audiobook player you need to pay a subscription fee! Why do you need to pay a sub fee for a basic feature like that? Bookplayer will do it better for free. if you need to slow down the playback of a song, this might be the app for you, but I need it to play audiobooks so for me, it was useless and I found it irritating that it required a subscription based annual payment for such a basic app.