I have the same problem these sensors are built in. But no App is on the Phone for the sensors. For hygrometer, thermometer, barometer on Google Store are Apps available. But for very much more interesting sensers  Air quality and UV meter are nothing availebel. These are advertised features of the...

I have a question to the BV9900.
 
Supports the BV9900  Buetooth SAP (SIM-Access-Profile Protocol)?
 
Regards 
TKTX