If you travel (don't we all?) and shop (likewise!), you need my new app "PricePer," which does conversions such "what's $3.50/gallon in €/liter?" or "what's 100¥/cm in $/yard?" PricePer provides up-to-date exchange rates for about 60 currencies in about 75 countries, plus British/American and metric units. It's available for the iPhone, iPod Touch and iPad from the Apple iTunes App store, and it works with iOS versions 5, 6 and now 7. PricePer was developed by Jay Anderson, a regular Untourist and unabashed Euro-junkie.