This app is not meant for India,so downloading is not available for India ,other country users can download it
With this app you can earn free google playstore credits Upto 1$ ,you just need to answer simple questions like
What is your favorite logo ?
Where do you plan on travelling next?
You will get the surveys frequently on the app ,in about a week time when they get ready,a notification will prompt when the survey gets available
You can use these credits at google playstore for getting the paid apps freely