SwiftUI vs Flutter Controversies ! Controversies everywhere ! SwiftUI was announced alongside iOS 13 and I think SwitftUI was expected… Apple is screaming: Vade retro Flutterus ! with its brand new declarative UI framework called SwitftUI. Let’s be honest, Flutter has been used by big tech companies and being among the top starred repositories on GitHub and I think that Flutter had too much outburst on the mobile development. It could be Apple’s reaction on Flutter announcement.