Catapush is a simple, reliable and scalable delivery API for mission-critical push notifications for applications. Ideal for corporation sending data-driven operational notifications including targeted e-commerce and personalized one-to-one messages. Thanks to delivery confirmation and real time status tracking of each message sent it is possible to build intelligent messaging logic in your app Catapush provides a real time dedicated in-app messaging channel always attempted first. Detailed delivery info and real time status (sent,delivered,read) about each message sent is provided via callback to backend system. The solution support text personalization with variable for massive sending and 2Way communication. SMS fallback for universal reach and additional reliability is provided too. Catapush solved the problem related to the fact that basic push doesn’t work for reliable communication running a business process from a mobile app. Companies requiring reliable & traceable communications had to develop proprietary systems e.g. Whatsapp. Catapush empowers developers and companies, who already have a mobile app and active subscriber base, to send reliable, traceable and cost effective transactional push notifications and in-app messages adding important features to basic push