The present invention relates to method for generating a monitoring signal by monitoring laboratory values of a patient using a medical app (122). The medical app (122) is executed on a mobile device (102) of the patient, wherein the execution of the medical app (122) on the mobile device (102) of the patient is supervised by a supervising entity or safety module (106, 128), the supervising entity or safety module (106, 128) comprising at least executable program instructions (130). The medical app (122) comprises executable instructions for executing at least one sequence of processes for generating the monitoring signal. The processes comprise safety critical processes. The sequence of processes is triggered by the measurement of the blood glucose level of the patient. The method comprises executing a first process of the sequence of processes, wherein the execution results in the generation of an information, forwarding the information of the executed process to the supervising entity or safety module (106, 128), evaluating the received information by the supervising entity or safety module (106, 128) and executing a second process of the sequence of processes depending on the result of the evaluation.
