Method for enhanced determination of analyte concentration in body fluid

An analytical method for determining a concentration of an analyte in a body fluid using a mobile device having a camera and a processor, the method comprising:

• i) capturing an image of at least a part of an optical test strip with the camera, the optical test strip having a sample of the body fluid applied onto a reagent test region of the test strip, wherein the image comprises at least a part of the reagent test region having the sample of the body fluid applied thereto;
• and
• ii) receiving local temperature information at a current location of the mobile device, wherein said local temperature information is received by the mobile device from at least two different temperature sources selected from the following:
• a) a remote weather information service;
• b) a temperature sensor of an external electronic device;
• and
• c) a temperature sensor of the mobile device;
• wherein the external electronic device is selected from the group consisting of one or more of wearables and body-worn sensors;
• and
• iii) determining, by the processor, a correction temperature and/or a correction temperature function, using the local temperature information from the at least two different ones of the temperature sources of step ii);
• and
• iv) determining, by the processor, the analyte concentration from the image captured in step i), based on a color formation reaction at the reagent test region having the sample of the body fluid applied thereto, taking into account at least one of the correction temperature from step iii), and the correction temperature function from step iii).