App not working,,after installing in mobile

My App working in MIT Inventor in companion but I generate .apk file and installed in my mobile,,,then sensor data not coming.Please help what to do now?

Can you briefly tell about your app and which sensor are you talking about?
I think the issue is with App Permissions. You would have to grant the permission in the Settings of your phone or ask the user to grant permission with the Screen1.AskPermission block

My app is just getting tthe water tank level using Ultrasonic sensor with Node MCU using firebase...All data coming in Companion Mode..but I created .APK file and installed. No data is showing...Even in same issue in Emulator also.