I am using this year since may 2018, this app is very unique,
by this app you can earn cash back by uploading selfie and by attaching bills.
any kind of bill can be uploaded on this. you just need to on your GPS.
I have referred many of my friends, by this me and friends got cash back
you can redeem your cash back by purchasing movie voucher, flipkart/ amazon vouchers, restaurant/hotel voucher, grocery store voucher, even you can recharge your phone number by this app
by this app I have purchased movie voucher and amazon voucher, and I will purchase one more movie voucher soon
I strongly recommend this app