Free Google Play Store Credits:
So for getting free credits in your account. You just need to install the Google Opinion Rewards app from play store and start to complete surveys by answering small questions and get paid for those surveys. Means, You’ll have to set up the app first by filling out an initial survey, which will then be used to decipher which kinds of surveys you will have to answer down the road, there will be one per week, each one differing in length and content. After answering the complete survey, Google will then credit your balance which you can then redeem at the Google Play store, including apps, books, games, movies, music and more. You can make up to 1 USD for each survey. Once you’ve accumulated enough Play Store Credits, you can redeem the credits at the Google play store to purchase paid apps or games.