PowerApps is part of Office 365, it helps you to create mobile-aware software apps that consume data from multiple data sources, providing customizable and responsive UI forms and integrating data in logic flows that can behave like enterprise-level workflows. The power of applications built with PowerApps is their capability to consume data securely through an open connector model and to connect with external REST-based services to execute actions. you can design an app that can be used to integrate different software and technologies, and you can consume that app from any place and using any device. Microsoft PowerApps is available as a web-based application for building and consuming apps, but there are also client apps for Windows and iOS.