There’s a lot of people out there who have their favorite technologies and there are few more passionate debates than the issue of using HTML5 or native development for mobile apps.
Native development allows apps to build on the look and feel that users are used to on their devices. Usability should therefore be better on a native app because buttons will be using standard (tested) sizes and provide feedback that the user expects. Because native apps are compiled and optimized for the hardware they naturally have a performance advantage over HTML.
Personally I prefer to use native stuff whenever possible. But sometimes it is just far easier to hook into a web server to deliver some dynamic content in which case it can be simpler just to display it in it’s HTML form.
The current feature I’m working on is to add a commenting system to a bunch of my apps. Using the django commenting app and jquery mobile I was able to get a pretty good web based commenting system in place in a few hours. Translating that to a native form in Objective-C would have taken much longer. So I’m just going to throw up a web rendering widget in the app to load the webpage.
I see the lines blurring over the next few years in this way. HTML is catching up to native in a lot of ways but native will always have some natural advantages and is also improving. Any new hardware features will first be accessible to native APIs before they are wrapped up by webkit and exposed for use in HTML. And differing platforms will always result in HTML5 apps that have to things like “if iPhone then …”. The main benefit for HTML5 then is centralizing to servers that can be quickly updated with bug fixes and that people have HTML/JS/CSS skillsets and want to work on mobile apps.
Right now is simply too early to jump into a pure HTML5 mobile app for anything serious though. As seen by the HTML5 based Facebook App which is terribly slow on both iOS and Android and got bad user reviews as a result of those performance woes. A native Facebook app is in the works to address those shortcomings. But I would predict that it won’t be until iPhone 7 comes out that HTML5 will be able to compete from a user experience perspective with native apps.