You can read posts from all the sites you follow (even the ones that aren’t on WordPress.com), find great new reads, and keep track of your comments and replies in one convenient place: the WordPress.com Reader.
Android - To get to your Reader, tap the second icon from the left on the top bar. It looks like a newspaper. When you are on that page, tap the gear on the right, close to the menu bar. You can add tags (or specific sites you want to follow) there by typing the words into the line at the bottom then tap the “+” on the right.
To read posts from a specific tag or list, go back to the main Reader page, tap the drop-down on the upper left, right below the menu line, then select your list. The “Followed Sites” option will show all the posts you follow from specific sites.
iOS - To get to your Reader, tap the second icon from the left on the bottom menu bar. It looks like a newspaper. When you are on the next page, tap the words “Followed Sites” then the word “Manage.” Type in the url for the site you wish to follow.