Hey there us kushagra singh and I am going to share my experience of google opnion rewards with you.
This is totally waste app that I ever use. I download this app because it is googles app so I think I can trust this app that it will give me some money. But when I installed it it gave me 2 survey with no reward. And after some of days it gives the survey for 0.10$. after one month I get only 2$.
The survey is only of their Google products and the length of their survey is very big according to their reward.
The other drawback is you cannot get rewarde in you adsense account you only can redeem it for purchase of paid apps of Google play store.
I recommend to all of you to dont waste your time by using this app.