Does the apps which are built in flutter need network connection

Answer 1

Only if you develop it that way.

Answer 2

Flutter apps can work both online and offline, depending on how they're designed. If the app needs real-time data or interactions with a server, a network connection is required. However, if the app is built to function offline, it can run without a network connection. You can explore more about apps built with Flutter in this helpful article: https://www.cleveroad.com/blog/why-use-flutter/