Play King is a free mobile app that allows users to earn rewards, which can be redeemed for gift cards, coupons, and cash. The app's features include viewing ads, playing games, and referring friends to the app. Users can also complete daily tasks to earn more rewards.

One of the unique features of Play King is its referral system. Users can invite their friends to join the app and earn points every time their friend signs up using their referral code. Additionally, Play King's game section offers various games that users can play to earn rewards.

The app's interface is easy to use, and users can track their rewards and progress in real-time. Users can redeem their rewards for gift cards from popular retailers such as Amazon, Target, and Walmart. Play King also offers a cash-out option, where users can transfer their rewards to their PayPal account.

In summary, Play King is a fun and engaging app that provides users with an opportunity to earn rewards in their spare time. With its various features, including referral system, daily tasks, and game section, Play King is an excellent option for anyone looking to earn rewards while enjoying entertaining content.