i Give you an Example -
i have a hosting server and there i want to install PAYTM (May be Others ) Android App.
1. I Want to Install 1000 Paytm app in my server and want to login by 1000 Different mobile no.
2. After login All option avilable.
We Receive Recharge Request by Web APi and its sent to server.
then Server open selected mobile no and paytm app.
All Will Be Autometic
Its an Example