Hi all, currently working on push notifications. I want to send push notifications to users, but I'm facing 2 little problems. 1) How can I send push notification to ALL users of my app? 2) How can I identify a device? Because I store tokens into database, and update if needed, but then I need a unique number. To know which record to update. Ofcourse I can generate some number, store locally on device and hope its 100% unique. like random(1000) * timestamp Code: [[NSUUID UUID] UUIDString] gives me a different result every time.