The C2Call iOS SDK by C2Call communicates with the API to access chat features that can be implemented into mobile applications. Documentation, GitHub repository, and examples are available as resources.
Pusher has released Beams, a push notifications API for mobile app developers. Pusher Beams allows developers to manage device tokens for iOS and Android apps. Developers can also use Beams to trigger notifications based on the in-app activity of users so that users remain engaged with their apps.
Twilio made its Programmable Video SDKs generally available. In addition to its GA versions of its video SDKs, Twilio launched a new REST API for Programmable Video. While thousands of apps have already utilized Twilio's video capability, Twilio says the tools are now production ready.