Actually after using this app for first time I got 51 rupees as I had downloaded form a referrer .
this app is quite good and trust-able because it is related to google so we can trust
and coming to the app understanding it is quite easy to use and understand.
you will get exiting coupons on transferring that is the one I liked .
but as far as I have used this app I have never got any money yet in coupons but it is true that you get money in those coupons
and the last thing to say is still a good app and I recommend it to use.
but one tip I would like to give is download from a referrer because you will not get 51 rupees if you directly download from app store or playstore you can use my refferal code to download.