What's the difference between these two? Do they both launch Safari (with the exception that the home-screen doesn't show a URL/tool bar?
I've found weird quirks that appear in home screen version..do they have different rendering engines? For example, mailto: doesn't work in home-screen mode, and there are some small rendering/css-styling bugs that don't appear if I visit my web application from mobile Safari.
Thanks!
Apple is using two different Runtime Environments for the Sarari Browser when launched as a browser or as a Homescreen app. The Homescreen environment suffers from multiple limitations:
- lack of print, mailto, caching-support and the list goes on ...
- in iOS 4.3 it doesn't have the new Nitro engine enabled, so performance will always be lower in this environment
来源：https://stackoverflow.com/questions/3239531/iphone-safari-vs-launch-from-home-screen-bookmark