Calculios is not a normal calculation game. You can compete on the network with all the calculation geniuses on Earth. Reach high ranking by winning them. In ranking battle, matching occurs according to the ranking. Also, you can make a room to play with friends or any other people. You can choose an operator, the number of operand digits, the number of operands, and so on. Finally, you can exercise dozens of levels in single mode. Log in to Facebook to see scores of your friends.