When comparing React Native vs Tabris Framework, the Slant community recommends React Native for most people. In the question“What are the best frameworks for developing cross-platform mobile apps with JavaScript?” React Native is ranked 2nd while Tabris Framework is ranked 14th. The most important reason people chose React Native is:
React Native allows you to create native apps by generating native views with JavaScript instead of using a web wrapper.
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Pros
Pro Allows you to develop native apps
React Native allows you to create native apps by generating native views with JavaScript instead of using a web wrapper.
Pro Large, supportive community
Despite being such a young framework (early 2015), the support for React Native grew quickly. There is a forum, active tag on Stackoverflow and many other ways to get help from the community.

Pro Backed by Facebook
Facebook writes their mobile apps in React Native so the code base gets pretty thoroughly used in some highly demanding scenarios.
Pro More predictable control of the state
The one way data flow, makes it more predictable and easy to control.
Pro Real device deployment
Connect your PC and mobile device through Wi-Fi using Tabris CLI - and just hit the Refresh button in your application to see the latest code version in action. No emulators or attempts to run a mobile application in the browser.
Pro Cordova plugins support
Most Cordova plugins work with Tabris as plug-n-play modules, without any special tuning.
Pro Beginner-friendly
Tabris is very easy to use. You can just download Tabris Dev App from Play Store/AppStore and run any example from GitHub or code snippet from documentation right away using Playground. Documentation is easy-to-follow, and to start developing in your local environment you should only download lightweight CLI tool that will pull application code from your PC to mobile device using Wi-Fi.
Pro Native widgets instead of web views
Tabris using native widgets - it makes your app run faster and look...native - regardless of platform. Stop trying to make your buttons look "like real iOS buttons" when you can just use the native ones.
Pro Completely free
Framework and all required tools are free. Playground and Dev App - free. Online build services -for free. For some time local build service was under a paywall, but now that feature is also free for everyone.
Cons
Con If core team doesn't use a certain feature, it's not developed
Whenever there's functionality you need that they don't use in their apps, it's not going to get developed by them, even if it's obvious it should be in the core. They always say to either submit a PR or create a separate module.
Con Steep learning curve
React Native is not the most beginner-friendly framework for creating mobile apps with JavaScript. It requires that the developer know React, which is known to have a steep learning curve.
Con Many existing JS libraries are not usable on React Native; not exactly a 1-to-1 experience to writing React either
Example: Library that provides a full calendar with agenda view.
In the end it's much easier to develop in actual JavaScript with a solution such as Ionic, especially if your app needs to work well on the desktop.
Con React native only supports react which is getting old
React native is only based on react which is getting old. An old tech developer can't take much breaking changes so it gets more patchs. There is a limit, and react is too verbose and complex. better alternatives available today.
