The default system UI for Fuchsia OS will be called as Armadillo. Armadillo and other Fuchsia apps are built on Google Flutter SDK, and the apps can be used on any platform- Android or iOS or Fuchsia OS.
If you’d like to see Armadillo in action, you can grab the APK file and Install it on your Android device from the below link. Armadillo will give you the first Alpha look at what Google’s next OS will be.
Armadillo's UI has a one big vertical scrolling page with incomplete application cards. To the bottom center we have just a home button, which shows a user’s profile. You can also combine two applications (Multitasking) by just long pressing a card and throwing it into another card.
Download Fuchsia OS Demo app - Here
(Compiled by Bradshaw | Via HotFixIt)