Yes, All Free!
If you installed the iPhone app and signed in with your Reddit account, you can view your personal home feeds right on your Apple Watch.
Sync your Reddit's subscription with one click, then you can view all your subscribed/favorited subreddits on your watch.
Lollybot helps you discover new subreddits, you can visit any subreddits you want by using the search function.
Lollybot allows you to subscribe and favorite a subreddit (or do the opposite) without using your iPhone!
With Lollybot, you can submit a new post and write a comment right on your wrist. You can even select a flair when you are creating a new post.
Found a fun and interesting post? Save it on your watch! Want to see your saved posts again? View it on your watch!
Want to stalk someone? Want to know someone better? Now, you can view users' profile without using your iPhone.
If you are too lazy to open the app, then you can use Lollybot's complication to view the latest/hottest/best posts right on your watch face.
With Lollybot, you can view PM from other users, write a PM to other users or send modmail, reply a message, and block a users.
Custom Feeds allow you to easily access your subreddits. Group your subreddits with your iPhone and view them on your watch.
Use Handoff to continue a task on your iPhone. For example, you can continue reading a post, submitting a new post, and writing a comment on your iPhone.
Upvote/Downvote Both Posts and Comments, See Post and User's Flairs, Image Preview, Twitter's Tweet/User Preview, Sign In With Two Accounts, Cake Day Indicator, Post's Awards Listing...