The Billboard.com Charts app allows you to get all of this and past week's Billboard charts all on your mobile phone. Allows you to view in full the Billboard 200 Chart, Hot 100 Chart, and numerous others for free. You can also preview any song on the chart via iTunes and you can buy as well directly from the app. For $1.99 a month you can view 5 additional charts in their entirety. Recommended for music geeks needing their chart fix. -Peter Amara
The Billboard Charts App provides free access to the top ten chart positions on 16 of our most popular charts, and 3 months of chart history. This includes the Billboard Hot 100, Billboard 200, genre-based charts and the new Billboard Social 50, a ranking of the most active artists on the world's leading social networking sites. Discover new music and preview and purchase songs on the fly.
For only $1.99 a year, you are able to access all 16 charts in their entirety and view chart history back to 1984.