A system comprising a mobile device being connected to a supervising entity or safety module, wherein the mobile device is operable to execute at least one medical app, wherein the execution of the medical app on the mobile device is supervised by the supervising entity or safety module, the supervising entity or safety module comprising at least executable program instructions, the medical app comprising executable instructions for executing at least one sequence of processes for generating the monitoring signal, the processes comprising safety critical processes, the sequence of processes being triggered by the measurement of laboratory values of the patient, the mobile device being operable to execute a first process of the sequence of processes, wherein the execution results in the generation of an information and to forward the information to the supervising entity or safety module, wherein the supervising entity or safety module is adapted to evaluate the information, wherein the mobile device is further adapted to execute the second process of the sequence of processes depending on the result of the evaluation.