Resources for mobile developers
To help build upon an already thriving mobile ecosystem, today we’re excited to launch new resources for mobile development, beginning with the Twitter framework for iOS. Since the launch of iOS 5, we have seen an incredible number of applications incorporate the Twitter framework, including the launch partners we highlight at http://ios.twitter.com. The iOS integration enables simple mobile sharing, and reflects our commitment to mobile Twitter integrations.
from Twitter Developers blogs https://dev.twitter.com/blog/resources-mobile-developers