Log in feature
Could you consider creating something like an account? Perhaps a voluntary one so you don't lose any downloads. I'm thinking one that could work despite having donated money or not. My main interest in having an account would be so it could automatically sync. I mainly listen to my podcasts on my smartphone, but also on my tablet. If I had an account that worked in that way I wouldn't have to scroll to mark episodes as "read" or subscribe again to synchronize it with my phone.
Please avoid creating duplicated entries.
Please vote for the existing one instead:
http://podcastaddict.uservoice.com/forums/211997-general/suggestions/4115735-cross-device-synchronization
Thanks