The OneSignal iOS SDK by OneSignal is for iOS applications in Objective-C language to use with the OneSignal API. The OneSignal REST API allows developers to access the functionality of OneSignal for integration with other websites and applications. OneSignal is a push notification service for mobile and web applications and websites.
Google's voice-based assistant took on new powers this week and increased its compatibility with hardware platforms -- including Apple's iPhone. With Assistant's growing user base and expanded skillset, Google thinks it's time for developers to add Assistant to their own hardware.