Google Opinion Rewards
If you still have confidence issues about whether these money-making apps work or not, you’ll be surprised to learn that Google also offers one of these rewarding applications. Google Opinion Rewards is a great example of how market research in the form of surveys and questionnaires can help you earn cash for using Android applications with the least possible effort.
All you need to do is download the Google Opinion Rewards application to your phone and configure it with your personal data and Google account. Once your account is validated, Google will occasionally send you short surveys to fill you in and reward you with Google Play credits in return. You can then spend these credits on the Google Play Store to buy anything from apps and games to movies and books right away. this is one of the best android money making apps.