Andrej Mihelic has Vert – Unit and Currency Converter (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $4.99) for a limited time.

Vert is the most amazing, efficient, elegant unit and currency iOS converter. You can personalize it to meet your requirements at its best. Let it be students, people of business, worldwide travelers, rock climbers, anyone who uses on-line recipes or shops on-line, etc. – they all appreciate Vert’s functionality. It blends in with your iPhone, iPod touch or iPad beautifully.