Abstract: The subject matter of this specification can be embodied in, among other things, a mobile device accessory that includes a first housing defining a first attachment surface that is configured to adhere to another surface, a user input mechanism configured to activate in response to input by a user of the mobile device, and circuitry configured to activate in response to activation of the user input mechanism, wherein activation of the circuitry (i) causes an audible alarm to be emitted by the mobile device, or (ii) causes a software application to be executed on a mobile device, or (iii) both.

Abstract: The subject matter of this specification can be embodied in, among other things, a mobile device accessory that includes a first housing defining a first attachment surface that is configured to adhere to another surface, a user input mechanism configured to activate in response to input by a user of the mobile device, and circuitry configured to activate in response to activation of the user input mechanism, wherein activation of the circuitry (i) causes an audible alarm to be emitted by the mobile device, or (ii) causes a software application to be executed on a mobile device, or (iii) both.

Abstract: The subject matter of this specification can be embodied in, among other things, a mobile device accessory that includes a first housing defining a first attachment surface that is configured to adhere to another surface, a user input mechanism configured to activate in response to input by a user of the mobile device, and circuitry configured to activate in response to activation of the user input mechanism, wherein activation of the circuitry (i) causes an audible alarm to be emitted by the mobile device, or (ii) causes a software application to be executed on a mobile device, or (iii) both.

Abstract: The subject matter of this specification can be embodied in, among other things, a mobile device accessory includes a housing defining an attachment surface that is configured to engage a mobile device, a wearable component configured to be worn by a user of the mobile device, a separation detector configured to detect separation of the wearable component relative to the housing, and provide a signal when the wearable component becomes separated from the housing, and an alarm device configured to activate in response to the signal. Alternatively, the mobile device accessory may be a standalone device not designed to be attached to a mobile device.

Abstract: The subject matter of this specification can be embodied in, among other things, a mobile device accessory includes a housing defining an attachment surface that is configured to engage a mobile device, a wearable component configured to be worn by a user of the mobile device, a separation detector configured to detect separation of the wearable component relative to the housing, and provide a signal when the wearable component becomes separated from the housing, and an alarm device configured to activate in response to the signal. Alternatively, the mobile device accessory may be a standalone device not designed to be attached to a mobile device.