Step1:
Check if you can connect to that device using nrf app from nordic semiconductor, if yes, after connecting you will get all the information needed to create your own app using B4x example
I just received the device.
nRF Connect mobile app can scan and list the device characteristics but I don't find any useful values.
I try to check the SDK if I have time.
Universal Blood Pressure Manager: manage your blood pressure data on Windows/Linux/macOS, view/print/mail as chart/table/statistics, analyze via SQL queries, import/export data as CSV/JSON/XML/SQL and much more…