Today the number of phones in the world are more
than five billion. With these devices a big wireless network can be
considered. In the last generation of phone there are a subset
called smartphone, the use of this subset is growing. These
devices are more and more sophisticated, capable of measuring
many parameters from environment. In order to do that this
smartphone is equipped with a several sensors and by means of
an application (APP) that pick up the information from each
sensor, it is possible to send, share, analyze, and display the
measured data. Nevertheless, people could use this data without
real information on accuracy of measured parameters. Thanks to
these devices in the next few years there will be the opportunity
to have a big wireless sensor network. With this paper the
authors begin to implement the first application that evaluates
the uncertainty on data sensors