This is best app I have ever seen in my life because they give us options to purchase things and as well as the give option of recharge such as
1) mobile recharge ( prepaid and post paid both)
2) electricity recharge
3) payment of fees
Metro, broadband payment etc etc and they also give us promo code for cash back on booking tickets as well as on packets of biscuits
This app also provide our own qr code for so those who want to share money with us they can share by scanning qr with their mobile
This app also help to do business when there is a situation of demonetisation.In short this is a nice app