The PressurePen is a pressure sensitive stylus for iPad and Android tablets. The plan is to commercialize a more final, refined version as open source hardware. What you see here and on the PressurePen site is the Beta prototype – functionally complete, and ready to put in the hands of developers. The necessary code to incorporate into an iOS or Android app is free and open source also. The goal is to allow others to create compatible products and improve on my designs.