The OneSignal Android SDK by OneSignal is for using the OneSignal API with Android applications in Java. 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.
In the case of emergencies such as serious accidents, bomb scares, severe weather conditions, equipment failure or fires and floods, it would be good to know that there's an accurate notification system to keep you informed and ready to react if necessary. AMTELCO’s RED ALERT API is an emergency notification system that is designed to save time, reduce errors and speed up overall response times.
Any mobile app that does anything interesting has an API. Yet most of the apps that help you get interesting things done do not expose that API to developers. For many of us, a to-do lists are the arteries of our work-life. Some popular task apps that could be integrating the disparate parts of our lives are instead maintaining silos of task data.