As a light comic book reader, I like CloudReaders (some on here don't, I do). For me it does the job, and it's free. If you're more intense about comic reading, then looks like Comic Zeal is your best bet (around $7). CR doesn't have too many features, it's a very basic reader, and that's all I need. Comic Zeal is a much better app, if you think it's worth it (if you read comics a lot, unlike me, I only read Archie from time to time with CR 😀) to shell out money for a reader, go for it.
For more info, I think there was a thread on here recently with some discussion on the different readers, search it up!