BitSpot

This is an app for iOS that displays the current Bitcoin exchange rate next to the spot price for precious metals like Gold.

See screenshots and a better description here: https://itunes.apple.com/us/app/bitspot/id632993426?ls=1&mt=8

BitSpot is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

BitSpot is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

See http://www.gnu.org/licenses/.