Week Calender, Amount - Unit & Currency Converter: FREE for iOS
Most devices have built in calendars, but most have them have only viewing capabilities. I discovered a whole new useful calendar though, and it's FREE for iOS devices. There's a lot of options other than view the date. It's called the Week Calendar, and you can have it downloaded to your iPhone, iPod or iPad FREE from Apple iTunes. Another useful app is the Amount, which works as a currency and unit converter. Great for travellers, who have to contend with metric to English units, and of course, monetary convertions. I've tried them, and they're really handy. Best of all, they're FREE from Apple iTunes.