Hacker News Reader

> you should be using Secure UDID or something similar

As an app developer, does this give me some benefit over just generating and saving a random UUID on first launch?

If you save the random number, what happens when they wipe the device and reinstall your app? No way to get that original number back. Secure UDID is deterministic, so you'd get the same ID, and can resume the original session.

One way around this is to store that number in iCloud. Then you can always get it back no matter the device.

Reply on news.ycombinator.com