You can directly lock the application. The steps are as follows:
1. First, please open the system desktop in the vivo phone and click "I Butler" on the desktop icon.
2. After entering the I-Butler page, find Application Encryption, and then click Go to Settings on the interface.
3. After entering the new interface, it is displayed to enter the privacy password, and then enter the set privacy password.
4. Then you enter the application software interface and just slide the button next to it. Then the software cannot be operated and you need to enter the privacy password.