This is an asset that helps you lock or unlock applications.When you hand over your application to customers, you don't want it to be spread randomly. You need to lock the application first, and then help the customer unlock it based on the random serial number in the application.You can customize the rules for serial numbers and activation codes through assets.You can customize the specific methods for locking and unlocking assets.It can generate a permanent activation code to permanently unlock the application on the corresponding device.Because we cannot confirm whether you have completely deleted the downloaded content. Once sold, no refunds of any kind will be accepted.