Exactly what I need for travel, though had to deduct one start: could not find a way to input a negative temperatur to convert. Low degrees fahrenheit e.g. will correctly convert into a negative celsius temp, but I cannot start out with a negative number.
Update: At the time I bought it, Negative temperatures could not be entered, due to the lack of a minus sign. I received a reply from support, that this should be taken care of with the next update. It has been taken care of. Thus I could add the remaining point.
Dirk_Eckert about Units - Unit Converter for your iPhone