Reederapp - By tapping and holding on an item, dragging left stars/unstars the item and dragging right marks it as read/unread.
THIS is my favorite part of reeder- this is why i read my feeds on my iphone instead of on the computer. WHY HASN’T APPLE PICKED UP ON THIS? HEY, APPLE ENGINEERS. USE THIS IN THE MAIL APP FOR HELL COME ON.