Ruby for Reddit provides a clean interface paired with functionality and customizations that the default Reddit app doesn't give you. If you're heavily active in the Reddit community, Ruby is the best option currently available.
On the surface, Ruby has a clean interface that doesn't distract from content. It comes complete with inline image support for many services and integration with Pocket. You can sign in to your Reddit account and view your subscribed subreddits and other profile information.
Ruby is free but ad supported. If you upgrade to Ruby Pro, you'll be able to remove ads, choose custom fonts, change color schemes, password protect your Reddit, and more. Ruby Pro can be accessed via the settings menu and is a one time purchase of $0.99.
Overall, Ruby gives you access to more customizations than the default app and seems to have a better layout. If you're a Reddit fan, we'd definitely recommend giving it a try. After you do, let us know what you think.