This week's mediaIDEAS onPoint chart shows global app downloads by platform (iPhone, Android, iPad). A recent snapshot had iPhones with over 459 million app downloads, Android devices with over 362 million, and iPads with over 61 million. That is close to one billion apps downloaded worldwide, and it continues to grow with Android devices slowly catching up to Apple's iOS devices.
Though it is still a bit of the Wild West in terms of publishing business models, apps, regardless of their platform, are a major area of opportunity. For more research, visit the mediaIDEAS website and blog, and on April 6 come to the TH(ink) E-reading 2011 Summit.