Non-therapeutic method for applying a cosmetic substance to the skin of a person, using a device for electrostatically spraying the cosmetic substance, the device comprising a) a container for the cosmetic substance, b) a nozzle arrangement for spraying the cosmetic substance, c) a conveying apparatus, for conveying the cosmetic substance from the container to the nozzle arrangement, d) a high-voltage source, e) a processor for processing measured values, wherein the device comprises at least one sensor and wherein the measured values are captured by the at least one sensor while the cosmetic substance is being applied to the skin of the person, f) a memory for storing the measured values, g) a transmitting and receiving unit for transferring the measured values to an external data processing apparatus and/or for receiving further measured values, further personal data relating to the person and/or further external data from the external data processing apparatus, the method having the following steps: h) the measured values, further measured values, further personal data relating to the person and/or further external data are captured and/or ascertained and transmitted to the processor, i) the processor processes the measured values, the further measured values, the further personal data and/or the further external data to produce at least one result, j) wherein the processor is intended to process reference values, ▪ the memory being configured to store the reference values, ▪ the transmitting and receiving unit being configured to transfer the reference values to the external data processing apparatus and/or to receive further reference values from the external data processing apparatus, and ▪ the reference values and/or the further reference values being captured and/or ascertained and transmitted to the processor, k) wherein the processor processes the measured values, the reference values, the further measured values, the further personal data, the further external data and/or the further reference values to produce at least one result, 1) wherein the processor compares the measured values, the further measured values, the personal data and/or the further external data with the reference values when calculating the at least one result, and m) wherein the processor takes the results as a basis for varying the application rate of the cosmetic substance to be sprayed from the device by regulating the high-voltage source. a) a container for the cosmetic substance, b) a nozzle arrangement for spraying the cosmetic substance, c) a conveying apparatus, for conveying the cosmetic substance from the container to the nozzle arrangement, d) a high-voltage source, e) a processor for processing measured values, wherein the device comprises at least one sensor and wherein the measured values are captured by the at least one sensor while the cosmetic substance is being applied to the skin of the person, f) a memory for storing the measured values, g) a transmitting and receiving unit for transferring the measured values to an external data processing apparatus and/or for receiving further measured values, further personal data relating to the person and/or further external data from the external data processing apparatus, h) the measured values, further measured values, further personal data relating to the person and/or further external data are captured and/or ascertained and transmitted to the processor, i) the processor processes the measured values, the further measured values, the further personal data and/or the further external data to produce at least one result, j) wherein the processor is intended to process reference values, ▪ the memory being configured to store the reference values, ▪ the transmitting and receiving unit being configured to transfer the reference values to the external data processing apparatus and/or to receive further reference values from the external data processing apparatus, and ▪ the reference values and/or the further reference values being captured and/or ascertained and transmitted to the processor, ▪ the memory being configured to store the reference values, ▪ the transmitting and receiving unit being configured to transfer the reference values to the external data processing apparatus and/or to receive further reference values from the external data processing apparatus, and ▪ the reference values and/or the further reference values being captured and/or ascertained and transmitted to the processor, k) wherein the processor processes the measured values, the reference values, the further measured values, the further personal data, the further external data and/or the further reference values to produce at least one result, 1) wherein the processor compares the measured values, the further measured values, the personal data and/or the further external data with the reference values when calculating the at least one result, and m) wherein the processor takes the results as a basis for varying the application rate of the cosmetic substance to be sprayed from the device by regulating the high-voltage source.