Jquerymobile is a JS frame under the mobile platform, with PhoneGap not a dime relationship. PhoneGap in fact, in the domestic share is not high, many people in order to experience like to do traditional native mobile phone applications. And WebApp's share of the current is getting smaller, Because more and more people do not like to use the mobile browser to experience the site specifically for the mobile platform. I think your comparison should be native app and web app and PhoneGap app. Personally feel that native and PhoneGap can count as a category, web The app has no advantage over the previous two. and the first two kinds of advantages are also obvious: native run faster, better performance, relatively high cost, the user experience may be better. PhoneGap development costs are relatively low, if there are existing sites, and can provide interfaces, And does not use some special functions (like processing), recommended. And PhoneGap's slogan was a development, compiled everywhere. So all you have to do is make phonegap mobile apps and easily compile cross-platform (ANDRIOD,IOS,WP8) mobile apps.
Performance comparison of mobile development platforms