Just head to Google Play (or check out the source repo if you’re into that).
So what does that app have to offer?
search (with all the additional parameters available on the booru search page)
content filters (default, everything, etc.) with spoilers shown for images with hidden tags
image interactions (fave, upvote, downvote)
image downloads
detailed image view (tags, faved by, comments)
(upcoming release) posting comments
Thanks, baby.