If you open Pandora radio with regular Pandora(not Pioneer Pandoralink)and then open Trapster you can have them both running. You can listen to Pandora and also hear Trapster at the same time. It doesn't matter which is openned first but you have to click on Pandora icon inorder to have control thru the Z120bt.It's a reel power hog with both running and your iphone will not gain any battery life.