Abstract: Embodiments may include a chip card having sound signaling circuitry, a power storage device, and a transducer to generate sound pulses intermittently or periodically for receipt by a mobile device to assist a client to find the chip card when misplaced or lost or help the client to find the mobile device when misplaced or lost. Logic of the chip card may detect a first trigger event, wherein the first trigger event comprises disconnection of a source of power to charge the power storage device, loss of communication with a mobile device, or completion of a transaction. Logic of the chip card may cause application of intermittent or periodic power pulses to the transducer to generate sound pulses based on power stored in the power storage device after the first trigger event. Logic of the mobile device may detect the sound pulses and display a representation of the intensity thereof.

Abstract: A system may include processing logic configured to execute instructions to cause a system to perform operations to provide a graphical interface for creating an event, receive, via the graphical interface, event input to create the event, including an invitee and a threshold number of invitees that can accept the invitation to the event, cause an electronic invitation to the event to be sent to a client device associated with the invitee, receive a notification indicative of an acceptance of the electronic invitation to the event, and display, via the graphical interface, that the threshold number of invitees have accepted the invitation to the event.