Use the Filter to hide read items
NetNewsWire can filter out stuff you’ve already seen, and only show you what’s unread.
Turn on the read items filter
Tap to turn on the read items filter.
Filter the Feeds list
When you turn on the read items filter for the Feeds list, only feeds with unread items will appear.
Filter Timelines
When you turn on the read items filter in the timeline, you’ll only see items that are unread. The filter only applies to that feed, so you can decide how each feed’s timeline will appear.