PilBox, yes. Also one of your brilliant ideas ... Something similar already exists since a couple of years ... https://jasonette.com/, renamed to https://jasonelle.com/
Some Google guys picked up the idea and made FLUTTER: One code, two binaries for Android and iOS. Dart Programming Language. Btw.: Works on Linux Desktop too. Windows haven't tried, not available at the moment. Also interesting: Draftbit built a highly sophisticated Cloud App Builder around Flutter. http://draftbit.com So, your brilliant ideas have become pretty widespread. Have fun! Best, Guido