I would recommend you focus on building a responsive web application using modern web technologies. (Perhaps ReactJS) Then in regards to a desktop application, perhaps you could use Electron. Electron would load the web view and BOOM...you have a desktop app that works on Windows, Mac, and Linux.
I would recommend you focus on building a responsive web application using modern web technologies. (Perhaps ReactJS) Then in regards to a desktop application, perhaps you could use Electron. Electron would load the web view and BOOM...you have a desktop app that works on Windows, Mac, and Linux.