If you want to write iOS applications that connect to App services, you can download the App services iOS SDK at:
- Download as a zip file: https://github.com/apigee/usergrid-ios-sdk/archive/master.zip
- Download as a tar.gz file: https://github.com/apigee/usergrid-ios-sdk/archive/master.tar.gz
Note: The Messagee iOS application uses RestKit, a popular REST framework for iOS, to communicate with App services. Because App services use a REST API, you can use any REST framework to talk with the service. However, the official App services iOS SDK provides a more convenient communication mechanism that you should use unless you're already using RestKit or some other framework in your project.