GiftBird: Rewards & Gifts is an arcade cash application that is specially designed for android mobile phones. It will provide you with lots of rewards and gifts. You will need to complete some surveys and download different applications or games to earn these rewards.
You can invite your friends to get coins. And if your invited friends invite their friends after joining the application, you will get extra coins for that. GiftBird: Rewards & Gifts is featuring for free on the Google play store.