The first thing to know is what Apple's corporate logo is. Simply put, Apple's corporate signature refers to those applications that are not on the Apple App Store. After signing, it can be directly installed on Apple's mobile phone without Apple's review. Otherwise, it cannot be installed on Apple's mobile phone.

Once the signature is invalid, the signed software can no longer be used, can't be opened, and will display "Application cannot be verified" and so on.

If the signature is invalid, you can choose Microfluidic Online Re-signature and re-install it after the signature is completed.