When comparing Material UI vs Flutter, the Slant community recommends Material UI for most people. In the question“What is the best CSS framework?” Material UI is ranked 8th while Flutter is ranked 25th. The most important reason people chose Material UI is:
Really nice implementation so far
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Adheres really well to the material design standard
Really nice implementation so far
Pro Perfect for React projects
Really convenient and easy to use components
Pro Open source
Pro Great developer tools debug/hotreload/analyser
Pro Based on Dart language
Dart is a Java like language, easy to learn and startup fast for millions of Java developers.
Pro A single codebase for iOS AND Android
Pro Fast
The developer's goal is to allow people to make apps running at 120 FPS.
Cons
Con Active development means API changes are frequent
Might be a problem for large projects, but since active development is a good thing, you should consider this rather mild inconvenience weighed against the benefits.
Con Still in development
According to the website, Flutter is still in its early stages of development.
Con Based on Dart language
Dart is a Java like language, easy to learn and startup fast for millions of Java developers. BUT if you have to learn it ... it's a con.
Con Dart is unpopular and never gained serious community traction like Kotlin or Java
Con Does not support 32-bit iOS devices
If you plan on targeting iPhone 5, 5C or earlier, you can forget about Flutter.