Microsoft announce new licensing options for PowerApps and Flow which will take effect in October 2019. Customers will be able to license internal users for an individual PowerApps app at $10 per user per app per month, or for unlimited apps at $40 per user per month.
PowerApps Portals will be the way to create and license apps for external users and this service is now in public preview from 18 July, 2019: http://bit.ly/2Oq92cf. Authenticated users will be charged at $200 for 100 logins per month and anonymous users will be $100 for 100,000 web page views per month.
From a Flow perspective, customers will now be able to choose to license an individual user to create unlimited workflows and business processes at a cost of $15 per user per month. Alternatively, they can choose to license individual business processes for an unlimited number of users at a cost of $500 per business process per month for up to 5 active workflows.