Very well designed native user interface that is optimized for browsing reddit on iOS.
When you reach the end of the list, just keep scrolling to load the next set of items.
You can add any subreddit,comment or post to your favorites stored locally on the device and synced via icloud
Share your favorite posts on Twitter, Facebook or via Email.
Add links to Instapaper. You can even customize the title of your link before adding it to Instapaper.
Search Reddit for submissions and subreddits. You can even save your searches for convenience at a later time.
View an history of all the posts,comments and subreddits you have viewed. The history data is private and is stored on your device. It is even synced between your iPhone,iPad and iPod Touch via iCloud.