title: Is inter-app communication possible without using URL Scheme in iOS?
body: <p>I want to open App A from App B, but App A is already in the appstore without configuring a <a href="https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/Inter-AppCommunication/Inter-AppCommunication.html%23//apple_ref/doc/uid/TP40007072-CH6-SW1" rel="nofollow">custom URL Scheme</a>. From App B how can I communicate with App A?</p>