Is the stand-alone game free? If not, how do you charge?

At present, the charging methods of stand-alone games mainly include downloading, activation, level and props. When users use stand-alone games, they will encounter charging points such as activation, levels and props. The game provides a page to prompt the user to confirm the payment. After the user confirms, the single game can be charged by SMS. The SMS collection process is as follows:

1) When users need to pay to activate games, levels and props during the game, the system prompts that they need to pay;

2) The user clicks to confirm the payment;

3) The user receives the second confirmation prompt message to confirm the payment amount;

4) The user confirms the amount and sends information;

5) The payment is successful, and the user receives the payment completion information.