The “Tweri Alzheimer Caregiver App” uses GPS to locate people who have become lost. If the Alzheimer’s patient goes outside of a certain radius, their smartphone automatically notifies their relatives of their location. The lost person can also simply send a distress signal themselves, even if they are still within the defined radius. The app helps minders of people with Alzheimer’s Disease and the patient themselves, above all in the early stages of the illness, since it affords them a certain amount of autonomy. The app was developed in part by the Spanish Association for Alzheimer’s Relatives.