Ask HN: How do you market your mobile application?

I've released an Advance android News Reader (Pro and free version) and am trying to get the word out, can you share your experience on an effective way to market mobile apps, or if you have any apps, how do you market them? So far I've tried pitching some android Blogs and started a facebook ad campaign.

P.S. The apps are: Fre Full text sparse rss: http://goo.gl/ZnlLK and Sparse RSS Pro