No. This site appears to display the server side website and then sends the image of this browser.
If you are only interested in Android and iPhone (and similar smartphones with webkit-based browsers), you can try a similar approach to http://iphonetester.com . This uses a frame built-in to simulate the size (in pixels) of the iPhone. Please note that although these browsers can be based on webkit, this does not mean that their implementation is the same - see http://www.quirksmode.org/webkit.html for dispersion different webkit based browsers.
This will not work if you want to deviate from other non-website based browsers.
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