iHygrometer is an application pretty, simple, accurate, and efficient. It lets you easily know what is the humidity near you. Contrary to standard applications (with predefined cities), this version of the hygrometer will give you precisely the humidity of where you are. It will give you the current pressure. It integrates its own conversion system.
A very practical application to a minimum price, why not indulge?
Exclusive: Available in english, french, german, spanish, italian, portuguese and dutch.

(To access all the functionalities of the station your iPhone must be connected to the internet (Edge, 3G or WiFi)).