I think I'm right in saying that you can access the board on a smartphone in it's browser. However, this can be a bit awkward due to the size of the screen. We have enabled the site to be viewed through a service called 'Tapatalk'. This consolidates the board and configures the display to something more suitable for viewing on a small screen.
For more information visit the site, you will need to download a suitable version of the app depending on what phone you use.
http://www.tapatalk.com/index.php