Hi myself kiran awatade
Playment is really a good app for earning free patym cash or gift voucher for flipkart amd snapdeal. Playment gives you daily task to complete such as surveys related to e commerce sites and various task and after completing them we get some amount of money you cannot expect to earn very big amount of money from this app but still it is trustworthy app.
There is no option for refer and earn you will need to download the app directly from playstore. You need to login to this app via facebook which seems to be convinient.
Recommended for those who want to earn online