A method includes obtaining first measurements of movement of a user, processing the first measurements of movement to determine whether the user has fallen, and initiating a revocation period to determine if the user stands up in response to determining that the user has fallen. During the revocation period, the method also includes obtaining second measurements of movement of the user and processing the second measurements of movement to determine whether the user stands up before the revocation period expires. The first and second measurements of movement are measured by a movement sensor of the device. In response to determining that the user has not stood up before the revocation period expired, the method also includes automatically sending a fall alert to an emergency service. The fall alert includes data that provides an indication that the user has fallen.