Regarding Unique identifier in iOS app
14755
UIDevice uniqueIdentifier deprecated - What to do now?
118743
Show badges in user profile in iOS app
59257
Is it possible to get the user's apple ID through the SDK?
130980
iOS: How to store username/password within an app?
26216
Is a GUID unique 100% of the time?
133772
Are there any gotchas with using two Apple IDs for one user in the App Store?
131455
Determine the exact date of creation of an Apple ID
32267
Can you what Apple ID is now associated with my MacBook Air using its serial number?
92640
How to handle user authentication persistance in IOS?
117823
Authentication using ios keychain - touch id (is this possible)
61128
Would it be beneficial to begin using instancetype instead of id?
98635
How can my iphone app detect its own version number?
34388
unique object identifier in javascript
121826
iphone xCode use of undeclared identifier
48494
In Ruby why does nil.id return 4?
155332
Unique Identification of iOS device for iOS 7.0 and above
22939
Is there a unique Android device ID?