JUniversal vs Sencha Touch: What are the differences?
What is JUniversal? A new, Java-based approach to cross-platform mobile apps (used by Google Inbox and Google Spreadsheets). The vision of JUniversal came from some guys at Nokia who possess considerable expertise both in Java and in building cross-platform apps. They built this tool to provide an elegant way to translate source code and make it useful across multiple platforms. JUniversal offers you the freedom to write your shared code in Java and then translate it to C# (available now) or to C++/Objective C++ (coming soon). You can also combine JUniversal with Google’s j2objc translator to translate Java to Objective-C for iOS.
What is Sencha Touch? The leading mobile web app framework based on HTML5 for amazing mobile apps. Sencha Touch 2, a high-performance HTML5 mobile application framework, is the cornerstone of the Sencha HTML5 platform. Built for enabling world-class user experiences, Sencha Touch 2 is the only framework that enables developers to build fast and impressive apps that work on iOS, Android, BlackBerry, Kindle Fire, and more.
JUniversal and Sencha Touch can be primarily classified as "Cross-Platform Mobile Development" tools.
Some of the features offered by JUniversal are:
- OAuth (based on Scribe)
- Unit testing (JUnit)
On the other hand, Sencha Touch provides the following key features:
- Built on HTML5 Technology- Sencha Touch 2, a high-performance HTML5 mobile application framework, is the cornerstone of the Sencha HTML5 platform.
- Smoother Scrolling and Animations- Sencha Touch 2 provides a user experience unparalleled in HTML5. Fluid Adaptive Layouts- Sencha Touch’s novel layout engine leverages HTML5 in powerful ways to let developers build complex applications that respond, load, and layout in a snap.
- Navigation View- The new Navigation View component makes it easy to make applications that feature beautiful animated transitions between screens as well as providing automatic back button management.
JUniversal is an open source tool with 132 GitHub stars and 22 GitHub forks. Here's a link to JUniversal's open source repository on GitHub.
What is JUniversal?
What is Sencha Touch?
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Comment from HackerNews (https://news.ycombinator.com/item?id=8998736)
This is how Google Inbox and Google Spreadsheets works. See the slides from my recently produced GWT Create Session (http://t.co/ZvoaHxCoZT). J2ObjC slide deck here (https://docs.google.com/presentation/d/1mW_Plm5jAygELf7qjVK7...) Videos of the conference will be online soon.
Prior to that, some 20% Googlers also produced the PlayN library (https://github.com/threerings/playn) This was taken over by Michael Bayne who added an iOS backend by Bytecode -> IKVM -> Mono conversion. I beleive j2objc and RoboVM backends exist now as well.
The major benefit of the j2objc approach is the avoidance of GC in favor of ARC, the conversion of message-sends into C-method calls when possible, and integration with existing iOS toolchain.
When we started, it seemed like an iffy idea, but after developing a product delivered to millions of users on a high volume site (gmail) that has 70% code sharing, and being able to simultaneously develop, test, and deploy across the platforms reasonably efficiently, a lot of skeptics have become converts to the concept.