Используйте приложение APKPure
Историческую версию Flutter ChatApp можно получить на Android
Приложение для чата - это набор пользовательского интерфейса, в котором есть все необходимые функции для экономии времени на разработку.
Flutter Chat App is a UI kit packed with all necessary screens and features aimed to save your development time. It also includes a card slide feature where an elegant slide animation is built right in, so you can just start off by customizing each card and play with the order in which they appear. There are lots of other features which you can explore and start building your own chat or messenger app.