When comparing Tizen vs Flutter, the Slant community recommends Flutter for most people. In the question“What are the best frameworks for creating mobile web apps?” Flutter is ranked 4th while Tizen is ranked 6th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Open source
Some parts of the OS are open source.
Pro Fast
Pro HTML5-based
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 Based on EFL libraries
A perfect experience of a developer working with EFL: https://what.thedailywtf.com/topic/15001/enlightened
Con Worst Code Base
Amihai Neiderman, a Kaspersky Labs researcher said, “It may be the worst code I’ve ever seen, Everything you can do wrong there, they do it. You can see that nobody with any understanding of security looked at this code or wrote it.”
Con Lack of apps
Con Aesthetically unappealing
Con Lack of security
With the recent discoveries of a number of security flaws, tizen is no longer a secure OS that it advertises.
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.