Flutter is an open-source mobile application development SDK created by Google. It is used to develop applications for Android and iOS, as well as being the primary method of creating applications for Google Fuchsia, Flutter widgets incorporate all critical platform differences such as scrolling, navigation, icons and fonts to provide full native performance on both iOS and Android.
Firebase is built on Google infrastructure and scales automatically, for even the largest apps, Firebase gives you functionality like analytics, databases, messaging and crash reporting so you can move quickly and focus on your users.