Trying to sink iTunes with my Samsung Galaxy S4

I just bought a new MacBook Air and I have been using Samsung Kies app to sync iTunes with my Samsung Galaxy S4 so that I can transfer podcasts to my phone. Unfortunately, the Kies app does not work well. It is slow and keeps quitting for no apparent reason. When I used to have a PC i used Easy Phone Sync, but recently I have tried Easy Phone Sync Plus (for Apple computers) and it isn't available in Google's App Store. Does anyone know of a good app which I can use to sync my Samsung Galaxy and iTunes?

Thanks!