Most of you guys may know the pebble watch, this watch receives push notifictions of you phone.
They are capable of receiving some notifications.
How can I do the same? Maybe they wrote some notifications their self using the facebook api or somthing like that. But how to do this with sms and calls?
What notifications are you able to catch?
It uses Bluetooth and talks through that to access all that data. It does not do anything fancy. However, all of that data is coming from the OS, not from applications on the device.
To answer your question - there is no way to get all of these notifications in your own app. You can use the CoreTelephony to access some of the data related to incoming calls and you could integrate Facebook and Twitter APIs to get that data, but you really would have to do it all yourself. There's no silver bullet here unfortunately!