nordlead on 29 October 2008
VGChartz only tracks retail sales and is currently branching into WiiWare and XBox Live Arcade sales.
Tracking online sales, like for the iPhone, is mostly impossible as other than asking the apple store for exact figures, there is no way to know this information. If you read any of the Virtual Console/Wii Ware/XBL methodology pages you will see there are some ways around this, but I don't think there are any similar methods for the iPhone.
