System to promote optimum performance of handheld cosmetic device

A system to promote optimum performance of a personal care appliance comprising:

• a personal care appliance having an appliance status;
• and
• a client device, in communication with the appliance, including circuitry configured to compare the appliance status with the protocol for using the appliance, and control display of an indicator based on the comparison,
• the personal care appliance further comprising:
• a brushhead for use in skincare,
• an appliance body having a motor assembly for oscillating the brushhead, and
• a brush encoder configured to encode the oscillation of the brushhead, wherein the encoded oscillation is the appliance status,
• wherein the indicator notifies a user that the brushhead is pressed against the user's skin with a force greater than a threshold based on upon detection of at least one of a change in frequency, a change in amplitude, and a change in phase that is indicated in the encoded oscillation.