In the game, players complete levels by swapping colored pieces of candy on a game board to make a match of three or more of the same color, eliminating those candies from the board and replacing them with new ones, which could potentially create further matches. Matches of four or more candies create unique candies that act as power-ups with larger board-clearing abilities. Boards have various goals that must be completed within a fixed number of moves or limited amount of time, such as a certain score or collecting a specific number of a type of candy.Candy Crush Saga is considered one of the first and most successful uses of a freemium model; while the game can be played completely through without spending money, players can buy special actions to help clear more difficult boards, from which King makes its revenues—at its peak the company was reportedly earning almost $1 million per day.Around 2014, over 93 million people were playing Candy Crush Saga, while revenue over a three-month period as reported by King was over $493 million. Five years after its release on mobile, the Candy Crush Saga series has received over 2.7 billion downloads, and the game has been one of the highest-grossing and most-played mobile apps in that time frame.