5 stars: If you wish to have small discounts for basically free is a must have. You can get 4 or more dollars to buy something and you can use it without spending money. (i.e. buying a .99 product with .99 credits will not make you pay anything) And the surveys are easy to do and depending on whether you allow them to see where you have been buying at will greatly increase rewards per week.
5 stars: I recieve surveys quite often, I wouldn't say 1 every week, but every 2 week I have a notification of a new survey. I did in-app purchases and on the Store directly. I hope for just an improvement: as credits expire after one year, it is not possible for me to save a larger amount of money for more expensive purchases. Overall, my experience with this app is very good and I would reccomend to anyone to install it.
4 stars: Great app for accumulating Google Play credits which can be used for nearly anything within the Play Store. Minus one star due to the rate at which credits expire compared to the rate at which surveys are sent out. The ratio of survey frequency to credit expiration has tipped in the negative direction, so it's harder to collect enough credits to be useful before they expire.
2 stars: Used to sync to my account fine, worked great. Now I have $40 on there and I figured I'd go buy something and they don't show up as a pay option. Shows in app, not on play store. Seems at worst customer service could just credit the account, but that went nowhere. Anothe...