I really like the UI you made. And the ability to change the number of days to keep posts is really cool too. Are you doing any checking for duplicate posts between sites?
Thanks! And yes! If you check out the CoreDataManager -- https://github.com/hodgesmr/CoderNews/blob/master/CoderNews/... -- you can see that I'm checking by url and title. There could be improvements though, like parsing trailing slashes that sometimes allow for dupes.