Napster on Iphone 6SE

I am probably a rare breed who uses Napster on an Iphone but does anyone know how to "Stop" a song or album from playing when your done? There is no Stop button. I can Pause it and sometimes that works. I dont use Apple Music or ApplePlay...this is only the Rhapsody/Napster application. No STOP button seems wierd. I have to turn off my phone to get it to stop playing. Very annoying