With canvas apps, you can control the design and layout of the app with a WYSIWYG design tool, connect it to different data sources (including the Common Data Service, SQL, SharePoint, Salesforce, Dropbox, etc), and add Excel-type formula code. With canvas apps, you can access the app through both a web user interface and a mobile app. The mobile app is accessed through the PowerApps app – you simply install this app and you can then access your canvas PowerApps.