Recently UDID has captured lot of media attention as third-party app developers had been sharing this ID with advertising agencies and marketing companies.
On this, Apple has shown its displeasure and sent an ultimatum to all third-party app developers; if the developers would share UDID of iPhones, Mac, or Apple Watch, their apps wouldn't find place in App Store.
This has certainly created a positive impact on iDevice users, who felt cheated.
With the solution of this issue, there rises confusion among users of iDevices: is there any difference between UDID and UUID?
Many iPhone, Mac and Apple Watch users have swamped our mailbox with this question; so our team did some research and got an answer.
If you look at how the two work, you will get an idea about the difference between UDID and UUID.
UDID is a Unique Device Identifier, which is a sequence of 40 hexadecimal characters that provide your iOS device a unique identity. You can find UDID of iPhones, Mac and Apple Watches by using different method.
UUID stands for Universally Unique Identifier, which is on a per-app basis. UUID recognizes an app on your iDevice, and it will stay there until a user completely deletes the app. If any user removes the app completely from his iOS device and then downloads the app again, the ID will change.