Speaking of Visual Basic... this tool (Windows based) that let's you quickly/easily develop an simple Android app using a flavour of Basic: https://www.b4x.com/b4a.html The developer recently released the tool's source and made it free. It's a mature tool with lots of community support. It also has a pretty slick GUI Android screen designer (Win only - but works in WINE). It might even be feasible to get the Gambas t…
All of these use the same dialect of BASIC, and I believe they can use (but don't have to) a cross-platform GUI.