A method for performing a fluid parameter measurement in a fluid sample comprising the steps of: a) installing a dedicated application software on a cell phone comprising an earphone socket; b) providing a fluid testing apparatus, said apparatus comprising: i) a strip adapted to absorb said sample and to produce a signal indicative of said parameter level in said sample; ii) means for processing said produced signal to thereby obtain a processed signal; and iii) an adaptor adapted to connect said strip to the cell phone to thereby allow delivery of said processed signal to said cell phone for obtaining a measurement of said fluid parameter displayed on said cell phone, c) inserting an earphone plug of said fluid testing apparatus into the earphone socket of the cell phone to thereby allow communication between said apparatus and said cell phone; d) subsequently loading a fluid sample on the fluid testing apparatus; e) upon delivery of said processed signal to the cell phone, further processing the delivered signal by said dedicated application software and obtaining the measured parameter level displayed on said cell phone screen; the method characterized by the steps of: f) functionally connecting said fluid testing apparatus to said cell phone via said earphone socket to thereby obtain at least a power supply and display means from said cell phone, said fluid testing apparatus thereby relying on the cell phone at least for power supply and display means; and g) delivering said processed signal to said cell phone via said earphone socket. a) installing a dedicated application software on a cell phone comprising an earphone socket; b) providing a fluid testing apparatus, said apparatus comprising: i) a strip adapted to absorb said sample and to produce a signal indicative of said parameter level in said sample; ii) means for processing said produced signal to thereby obtain a processed signal; and iii) an adaptor adapted to connect said strip to the cell phone to thereby allow delivery of said processed signal to said cell phone for obtaining a measurement of said fluid parameter displayed on said cell phone, i) a strip adapted to absorb said sample and to produce a signal indicative of said parameter level in said sample; ii) means for processing said produced signal to thereby obtain a processed signal; and iii) an adaptor adapted to connect said strip to the cell phone to thereby allow delivery of said processed signal to said cell phone for obtaining a measurement of said fluid parameter displayed on said cell phone, c) inserting an earphone plug of said fluid testing apparatus into the earphone socket of the cell phone to thereby allow communication between said apparatus and said cell phone; d) subsequently loading a fluid sample on the fluid testing apparatus; e) upon delivery of said processed signal to the cell phone, further processing the delivered signal by said dedicated application software and obtaining the measured parameter level displayed on said cell phone screen; f) functionally connecting said fluid testing apparatus to said cell phone via said earphone socket to thereby obtain at least a power supply and display means from said cell phone, said fluid testing apparatus thereby relying on the cell phone at least for power supply and display means; and g) delivering said processed signal to said cell phone via said earphone socket.