Microsoft PowerApps is a service for creating and publishing modern cross-platform business apps without having to do any coding. If you can use PowerPoint and Excel, you can build an app with PowerApps!
PowerApps connects to the Common Data Model, as well as existing and systems and data sources to allow you to build apps, forms, and workflows without writing code, as well as publish and share these apps instantly for both web and mobile devices.
And since the Dynamics 365 business applications and Office 365 productivity tools are all part of the Common Data Model, you can easily build and deploy apps that unify your business processes and your productivity and collaboration environments, giving employees a single user experience for completing even their most complex tasks. For more advanced apps, combine PowerApps with the automation of Microsoft Flow and analytics from Power BI.