Fluid testing apparatus

The invention is directed to a mobile hand held miniature laboratory system in general, and to fluid testing apparatus for performing a parameter measurement in a fluid sample and methods of use in particular. The apparatus comprising: a strip adapted to absorb a fluid sample and to produce a signal indicative of said parameter level in said sample; and adaptor adapted to connect said strip to a smart phone to allow delivery of the produced signal or a correlated signal to said smart phone for obtaining a measurement of said fluid parameter displayed on said smart phone, wherein said testing apparatus relies on said smart phone at least for power supply and display means. The fluid may be a physiological fluid such as blood, urine, saliva or amniotic fluid, or a non-physiological fluid such as fluid obtained from industrial pools for fish or algae growth, or entertainment swimming pools.