I have made an app and i am using a samsung mo1 and it is not installing

i got the qr code but the app is not installing on the phone

I did the same code and the same design for other 2 screens
the only difference is the map that shows ariel map & Terrien map

Do your devices all have the temperature sensor?


Also, why repeat the same thing in three screens, when you could simply switch the map view.....