J2ObjC vs React Native

Overview

J2ObjC

Stacks8

Followers20

Votes6

GitHub Stars6.0K

Forks991

React Native

Stacks34.4K

Followers29.5K

Votes1.2K

GitHub Stars124.4K

Forks24.9K

J2ObjC vs React Native: What are the differences?

What is J2ObjC? Java to iOS Objective-C translation tool and runtime used by Google Inbox to share 70% of its code across Android, iOS, and Web. J2ObjC is an open-source command-line tool from Google that translates Java code to Objective-C for the iOS (iPhone/iPad) platform. This tool enables Java code to be part of an iOS application's build, as no editing of the generated files is necessary. The goal is to write an app's non-UI code (such as data access, or application logic) in Java, which is then shared by web apps (using GWT), Android apps, and iOS apps.

What is React Native? A framework for building native apps with React. React Native enables you to build world-class application experiences on native platforms using a consistent developer experience based on JavaScript and React. The focus of React Native is on developer efficiency across all the platforms you care about - learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.

J2ObjC and React Native belong to "Cross-Platform Mobile Development" category of the tech stack.

"Backed by Google" is the primary reason why developers consider J2ObjC over the competitors, whereas "Learn once write everywhere" was stated as the key factor in picking React Native.

J2ObjC and React Native are both open source tools. React Native with 78.8K GitHub stars and 17.6K forks on GitHub appears to be more popular than J2ObjC with 5.47K GitHub stars and 771 GitHub forks.

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Advice on J2ObjC, React Native

Nick

CTO at Pickio

Jun 2, 2020

Decided

We built the first version of our app with RN and it turned out a mess in a while. A lot of bugs along with poor performance out of the box for a fairly large app. Many things, that native platform has, cannot be done with existing solutions for RN. For instance, large titles on iOS are not fully implemented in any of existing navigations libraries. Also there's painfully slow JSON bridge and many other small, yet annoying things. On the other hand Flutter became a really powerful and easy-to-use tool. A bit of a learning curve, of course, because of Dart, but it worth learning. Flutter offers TONS of built-in features, no JSON-bridge, AOT compilation for iOS.

491k views491k

Comments

Andrea

May 26, 2020

Needs adviceon

Vue.js

Vue Native

React

I'm a huge fan of Vue.js and I'm pretty comfortable with it. I need to build a mobile app for my company and I was now wondering whether I could make use of VueJS with Vue Native instead of switching to React. I know Vue Native builds on top of RN. My question is whether I'd have as much freedom with Vue Native over RN and whether you feel like Vue Native is "production ready" or not. Not sure of which shortcomings I may find using Vue Native... Thanks a lot!!!

336k views336k

Comments

Furqan

Jul 16, 2020

Needs adviceon

React Native

Hello guys, I am new here. So, if I posted without specific guidelines, please ignore.

Basically, I am an iOS developer and developing native apps for the last three years. Recently, I started learning React Native to develop apps for both platforms. If anyone out there knows any useful resources that will become a better react native developer.

@{#newbie}|topic:null|

325k views325k

Comments

Detailed Comparison

J2ObjC	React Native
J2ObjC is an open-source command-line tool from Google that translates Java code to Objective-C for the iOS (iPhone/iPad) platform. This tool enables Java code to be part of an iOS application's build, as no editing of the generated files is necessary. The goal is to write an app's non-UI code (such as data access, or application logic) in Java, which is then shared by web apps (using GWT), Android apps, and iOS apps.	React Native enables you to build world-class application experiences on native platforms using a consistent developer experience based on JavaScript and React. The focus of React Native is on developer efficiency across all the platforms you care about - learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.
-	Native iOS Components;Asynchronous Execution;Touch Handling;Flexbox and Styling; Polyfills
Statistics
GitHub Stars 6.0K	GitHub Stars 124.4K
GitHub Forks 991	GitHub Forks 24.9K
Stacks 8	Stacks 34.4K
Followers 20	Followers 29.5K
Votes 6	Votes 1.2K
Pros & Cons
Pros 4 Backed by Google 1 Made it possible to quickly port a hardware driver 1 Access to existing Java libraries	Pros 214 Learn once write everywhere 174 Cross platform 169 Javascript 122 Native ios components 69 Built by facebook Cons 23 Javascript 19 Built by facebook 12 Cant use CSS 4 30 FPS Limit 2 Slow
Integrations
Java Objective-C	No integrations available

What are some alternatives to J2ObjC, React Native?

Ionic

Free and open source, Ionic offers a library of mobile and desktop-optimized HTML, CSS and JS components for building highly interactive apps. Use with Angular, React, Vue, or plain JavaScript.

Flutter

Flutter is a mobile app SDK to help developers and designers build modern mobile apps for iOS and Android.

Xamarin

Xamarin’s Mono-based products enable .NET developers to use their existing code, libraries and tools (including Visual Studio*), as well as skills in .NET and the C# programming language, to create mobile applications for the industry’s most widely-used mobile devices, including Android-based smartphones and tablets, iPhone, iPad and iPod Touch.

NativeScript

NativeScript enables developers to build native apps for iOS, Android and Windows Universal while sharing the application code across the platforms. When building the application UI, developers use our libraries, which abstract the differences between the native platforms.

Apache Cordova

Apache Cordova is a set of device APIs that allow a mobile app developer to access native device function such as the camera or accelerometer from JavaScript. Combined with a UI framework such as jQuery Mobile or Dojo Mobile or Sencha Touch, this allows a smartphone app to be developed with just HTML, CSS, and JavaScript.

Framework7

It is a free and open source mobile HTML framework to develop hybrid mobile apps or web apps with iOS native look and feel. All you need to make it work is a simple HTML layout and attached framework's CSS and JS files.

Qt

Qt, a leading cross-platform application and UI framework. With Qt, you can develop applications once and deploy to leading desktop, embedded & mobile targets.

PhoneGap

PhoneGap is a web platform that exposes native mobile device apis and data to JavaScript. PhoneGap is a distribution of Apache Cordova. PhoneGap allows you to use standard web technologies such as HTML5, CSS3, and JavaScript for cross-platform development, avoiding each mobile platforms' native development language. Applications execute within wrappers targeted to each platform, and rely on standards-compliant API bindings to access each device's sensors, data, and network status.

Expo

It is a framework and a platform for universal React applications. It is a set of tools and services built around React Native and native platforms that help you develop, build, deploy, and quickly iterate on iOS, Android, and web apps.

Vue Native

Vue Native is a mobile framework to build truly native mobile app using Vue.js. Its is designed to connect React Native and Vue.js. Vue Native is a wrapper around React Native APIs, which allows you to use Vue.js and compose rich mobile User Interface.

Related Comparisons

"Backed by Google" is the primary reason why developers consider J2ObjC over the competitors, whereas "Learn once write everywhere" was stated as the key factor in picking React Native.

J2ObjC vs React Native