Apple could be limiting the speeds of web applications launched from the homescreen on iPhone and iPad devices, potentially limiting the effectiveness of HTML apps by developers, it has emerged in a report by technology website The Register.
Web applications were found to be running at â€śsignificantly slower speedsâ€ť when they were launched from the homescreen of an iOS 4.3-powered device, instead of being launched from directly within Safari, rendering â€śtwo and a half times slowerâ€ť than when loaded within the browser.
Apple, which advertises that it fully supports HTML5 and the development of web-based apps, allows users to save website bookmarks to their homescreens, providing developers with a way to replace native applications that are available via the Apple App Store with web applications.
One mobile web app developer believes Apple is purposefully limiting how web apps are loaded:
â€śApple is basically using subtle defects to make web apps appear to be low quality â€“ even when they claim HTML5 is a fully supported platform.â€ť
Another developer has identified that homescreen web apps arenâ€™t currently using the various web caching systems available to them. This includes the HTML5 Application Cache, meaning web apps/websites canâ€™t run offline and are not rendered using Appleâ€™s newÂ â€ťasynchronous modeâ€ť, instead they are loaded using the old â€śsynchronous modeâ€ť, which means means they donâ€™t look as good as they should.
The tests performed by The Register show the speed differences between homescreen and browser loaded web apps. The left image shows a website loaded from the browser, the right from the homescreen:
Left â€“ 4047ms / Right 10747.3ms
Apple did not respond to requests for comment but is aware of the problems, acknowledging speed issues on the companyâ€™s developer support forums.
It is easy to believe that Apple is purposefully limiting web applications, ensuring that developers come back to its ecosystem to develop iOS apps that are able to run without limitations. With the recent launch of in-app subscriptions, some developers have had to develop pure HTML5 applications so they donâ€™t fall foul of becoming a â€śService As A Serviceâ€ť app that would mean they would have to pay Apple 30% of each subscription they earned via the app.
We will be keeping an eye on the issue and report if Apple addresses the issues.