In December last year, Microsoft announced the preview of Whiteboard, a freeform digital canvas app for Windows where people can create and collaborate content. Today, Microsoft announced that Whiteboard app is now generally available for Windows users. Microsoft also announced that they are bringing Whiteboard experience to iOS and the web.
Microsoft Whiteboard is available for Windows 10 devices here. For commercial users, the Whiteboard app will be coming soon to iOS devices and will be accessible from other devices via the Whiteboard web client (preview).