This is the essential podcast app – Podcast Player RSSRadio Review

RSS Radio does the one thing I absolutely need in a podcast app, it allows you to easily listen to old podcasts in chronological order. It does this with an option called “download oldest unlistened”. With this option, when you finish a pod and it is deleted, the app will then download the oldest pod that you have not listened to and add it to the play queue. I listen to a lot of podcasts like this, mostly on history and this app has saved me an enormous amount of time. AFAIK, no other podcast app has a similar feature.
Review by LostInTheTrees on Podcast Player RSSRadio.