OBDeleven BMW related questions

Which BMW models are supported by OBDeleven?
Will the BMW application work in my country?
Which device do I need to use for BMW vehicles?
Which Application do I need to use for BMW vehicles?
What functions will I be able to use on BMW?
Can I use the same login with both OBDeleven mobile apps?
Can I use my current credits or PRO/ULTIMATE account with the OBDeleven application?
Why I can't see One-Click Apps while connected?
How to buy credits on the OBDeleven application using Android?
How to buy credits on the OBDeleven application using iOS?