Survey Mini is a wonderful app that my husband and I have used for almost a year now. I recall the first time we installed this app we were at the movie theater waiting to see a movie for free and right there my husband got a survey about AMC Movie Theater and right then once he finished his survey he got a coupon for a Free small popcorn.
This app notifies you once there are available surveys for you but is depending on the store, restaurant or place you may be in on that day. The rewards can go from
a coupon for a specific store/restaurant or
a free item to a specific place or
even some points to help you earn free gift cards.