Pen Tool SVG is a free vector drawing tool that allows users to create vector designs on their Android devices. The app offers a fountain pen tool that allows users to define each curve with two control points and an origin and endpoint by dragging their finger on the screen. The precision achieved while drawing with a finger is similar to drawing with a mouse, thanks to the use of a pointer. One of the main features of the app is its ability to export drawings in SVG format, which can be imported easily with more complex vector design programs like Adobe Illustrator. However, SVG import is not supported for files created outside the app. Overall, Pen Tool SVG is a handy tool for creating vector designs on the go.