Mark makes drawing flowcharts and diagrams as easy as drawing with a pencil. It automatically converts shapes and text as you draw with Apple Pencil.
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Visio Viewer Alternatives
Visio Viewer is described as 'VSD Viewer opens Visio drawings directly on a computer without conversion on external Web Servers. Viewing Visio documents is as simple as dragging and dropping off files (with a .vsd, .vsdx, .vdx extension) to the Application window' and is a Mind Mapping tool in the office & productivity category. There are more than 50 alternatives to Visio Viewer for a variety of platforms, including Windows, Mac, Web-based, Linux and iPhone apps. The best Visio Viewer alternative is draw.io, which is free. Other great apps like Visio Viewer are LibreOffice - Draw, Pencil Project, yEd Graph Editor and Dia.