Personal data collection, probably. I cant imagine it is for the user's benefit ...

pydry on Dec 27, 2021 | parent | context | favorite | on: There's an ARM Cortex-M4 with Bluetooth inside a C...

Personal data collection, probably. I cant imagine it is for the user's benefit that it uses bluetooth and requires an app, but it does let them hoover up your contact details and infection status. This probably sells > cost of the electronics.