When users use Apple devices to download applications, they need Apple to verify and sign the applications before downloading and installing them.

Apple's signature review time is usually several hours to three days after submitting the application. The specific time depends on Apple's audit speed, which may be different due to the complexity of the application and the audit queue. The following are some factors that affect Apple's signature review time:

The more complex the 1. application, the more functions involved and the longer the audit time may be.

2. If innovative technology is used in the application, it may take longer to review.

3. If the classification where the application is located ranks high, it can be reviewed first.