Make google play credit with my #3 must have app

Number 3 of my must have apps is Google Opinion Rewards

Google Opinion Rewards is a Google app that rewards you with Google Play credit upon completing extremely short surveys. You begin by answering a few questions that ultimately determine what surveys you are sent, as each one is based on locality, age and income, to name a few.
Each survey can reward anywhere from $0.10 and higher depending on the length and topic of the survey. That may seem like an insignificant amount but as to date I have amounted around $10 aud of credit, meaning I haven't spent any of my own money on apps recently.

If you are patient enough to save up credit, or wait for apps to drop in price, the Google Opinion Rewards app has the potential to supply all the credit you need for infrequent app purchases.

I don't really have any negatives about the app as the surveys are short, sweet and provide surprisingly fair amounts of credit based on the length and complexity of each survey.

This app is definitely a must for any Android user.