A smartphone includes a receiver, a log acquirer, a determiner, an information notifier, and a display. The receiver is in wireless communication with a time display device. The log acquirer acquires log data from the time display device by the receiver. The determiner determines the usage status of the time display device on the basis of the log data acquired by the log acquirer. The information notifier provides, via the display, notification of information corresponding to the usage status determined by the determiner.