"...spot gold and silver ... website tailored to mobile devices..."

Kitconet.com has URL's that deliver single tiny charts, about 2K in size. Here are some for spot gold and silver...

8 hour spot gold...
http://www.kitconet.com/charts/metal...

24hr spot gold...
http://www.kitconet.com/charts/metal...

8 hour spot silver...
http://www.kitconet.com/charts/metal...

24hr spot silver
http://www.kitconet.com/charts/metal...

There are about a dozen configurations for each metal. Here is where I found the gold ones, for example...
http://www.kitconet.com/webcharts/au...
Look just underneath each of the charts in the left hand column. There you will find a link with the direct URL for that particular chart.

For similar bookmarks for other metals and currencies, go to this mainpage and check out the links along the left hand side...
http://www.kitconet.com