A method for evaluating the suitability of a mobile device having at least one camera for performing an analytical measurement based on a color formation reaction, comprising: a) providing the at least one mobile device having the at least one camera; b) providing at least one object having at least one reference color field; c) taking at least one image of at least part of the reference color field by using the camera; d) deriving at least one item of color resolution information by using the image, wherein the at least one item of color resolution information comprises one or more numerical values, which quantify the capability of resolving two or more colors and e) comparing the at least one item of color resolution information with at least one threshold value, thereby determining at least one item of suitability information on the suitability of a mobile device for the purpose of performing the analytical measurement based on the color formation reaction; wherein the step of deriving the at least one item of color resolution information by using the image comprises: d1) determining at least one region of interest within the image; d2) determining at least one color coordinate of pixels of the image within the region of interest; d3) performing at least one statistical analysis on a distribution of the color coordinates of the pixels and deriving the at least one item of color resolution information by using at least one result of the statistical analysis; wherein the statistical analysis comprises a histogram analysis of a distribution of color coordinates, wherein the statistical analysis comprises determining at least one width of at least one color peak within the distribution of color coordinates, wherein the method comprises comparing the width with at least one threshold value for determining the suitability of a mobile device for the purpose of performing the analytical measurement based on the color formation reaction, wherein at least one item of color resolution information comprises the width. a) providing the at least one mobile device having the at least one camera; b) providing at least one object having at least one reference color field; c) taking at least one image of at least part of the reference color field by using the camera; d) deriving at least one item of color resolution information by using the image, wherein the at least one item of color resolution information comprises one or more numerical values, which quantify the capability of resolving two or more colors and e) comparing the at least one item of color resolution information with at least one threshold value, thereby determining at least one item of suitability information on the suitability of a mobile device for the purpose of performing the analytical measurement based on the color formation reaction; d1) determining at least one region of interest within the image; d2) determining at least one color coordinate of pixels of the image within the region of interest; d3) performing at least one statistical analysis on a distribution of the color coordinates of the pixels and deriving the at least one item of color resolution information by using at least one result of the statistical analysis;