This app designed for tracking of objects with GPS devices on map. First you have to scan the QR Code provided by your service provider then you can start your tracking.
For testing purpose:
1.download this app , install on your android phone and open (by default a scanner will open)
2. open below link in your pc or any other phone for the test QR Code and scan
https://firebasestorage.googleapis.com/v0/b/bw08-sms-tracking.appspot.com/o/qrcode.png?alt=media&token=2dd045a2-b344-4812-ad5a-2fb119296c75

After successful scanning , your tracking of the particular device will started .
All the details are available on map regarding your tracking devices and it will refresh automatically in a particular interval.

Moreover :-
App is in two different languages and dark theme are available as well.