Track App download from link

Hallo Kodular Tram and Users

My App is a QR & Barcode Reader App, I want to create a sharing system in which if a user shares my app link to his friend or family I can reword him.

Since nobody will sign up for QR Scanner App. I have to track App Download via Link Only

I work on Modular
So if anybody can help me regarding this it would be a great help.

Thanks

My App: https://play.google.com/store/apps/details?id=com.barcodereader.cashbackx