The steps to apply for an account with this software are as follows:

1. Visit the official website of "Changyan" and click the "Register for Free" button in the upper right corner.

2. Fill in the registration information, including user name, password, mobile phone number and other personal information.

3. Submit the registration information. After the registration is completed, you can use the new user name and password to log in to the Changyan platform.

4. On your mobile phone, you can download the Changyan Mandarin APP from the mobile app store. After installation, select the "Register" option, enter the mobile phone number, verification code and other information in the mobile phone number registration interface, and click Complete registration in one step.