[corysama]

What a lot of apps really need is for Apple to provide a UDID replacement that gives a different ID per app, but is consistent if the app is deleted and re-installed on the same device. SecureUDID is still based on CFUUID which is not consistent across re-installs.

[idunno246]

They store it in the pasteboard, which potentially will persist across reinstalls.

If its like how openudid works(and I understand it right), as long as one app remains that has secureudid installed, it will persist all the apps whether installed or not.