General Discussion - No lesson text on iPod

I am just trying ChinesePod.

But on my iPod 4G I cannot see any lesson text as advertised by ChinesePod. Do I need an IPhone or IPod touch (as displayed on the Chinesepod start page) to view the PDF or the text while listening??

I am a little bit confused about the possibilities of different mp3-players to display the text. May be someone give me some advice on this topic.

Thanks in advance