The "Monitor vital signs with a smart watch" service is a service that allows you to easily check the health status of a person from a distance using a smart watch.

When using a Fitbit smartwatch with this service, the official Fitbit app will relay data communication on the paired smartphone.
If the smartphone OS is Android 8, data communication may not be possible when the smartphone is in the background or when the smartphone is in sleep mode.

This app regularly monitors the startup status of the Fitbit official app and prompts for data communication necessary for the service.