App that allows measure substances of interest with a single photograph

Nowadays the reference technique to evaluate the concentration of analyte using colorimetric sensors is ultraviolet visible (UV-vis) spectroscopy. Nowadays the reference technique to evaluate the colour changes of colorimetric sensors is ultraviolet-visible (UV-Vis) spectroscopy. This type of technique requires specialized personnel to handle this type of equipment, in addition to a long and tedious experimental procedure that requires a prior calibration that allows calculating the concentration of the species of interest in a test sample. This app would let measure the analyte concentration quickly, easily and efficiently with a simple digital photograph. To carry out the measurements, it is necessary to photograph the sample calibration and the samples problem.