ClearBlocks-classic block game is a free iPhone app developed by li pan. It falls under the lifestyle category and is based on the popular game Tetris. The objective of the game is to move, rotate, and place various shaped blocks in order to complete and eliminate one or more rows, earning points in the process.

Known for its easy-to-understand gameplay, Tetris has become a favorite among people of all ages and is popular worldwide. It has received numerous awards and is considered one of the most classic games of all time. Additionally, Tetris holds several world records, including being the largest video game platform and having the longest game played.

In a study conducted by British psychologists on February 22, 2014, it was found that playing Tetris can help reduce the psychological cravings for fatty foods and snacks among dieters. It has also shown promise in curbing the cravings of individuals trying to quit smoking.