Diamond 2021 is a free match-3 puzzle game developed by game4v for Android devices. As the name suggests, the game is all about swapping and matching jewels to score points and progress through the levels.

The gameplay is simple yet challenging. The objective is to match jewels in groups of three or more to eliminate them from the board. The fewer moves you take to complete a level, the higher your score will be. With each level, the difficulty increases, making it a rewarding challenge to master. The game is easy to learn, but it requires strategy and skill to achieve a high score and earn three stars on every level.

Overall, Diamond 2021 is a fun and addictive match-3 puzzle game that offers hours of entertainment. If you're a fan of this genre, give it a try and see how far you can go!