I'm curious about that too. What limitations does Android have that make pivoting hard to do? Why weren't they working on both an Android and iOS app, no to mention WebOS and WP7. It does seem there are a lot of options out there, so there must be a very good reason not to have utilized those platforms. Does iOS provide some APIs that make this type of online purchasing model so much easier than other platforms that it's not even worth investing in something else?