Android and iOS

[JB]

What is the earliest version of Revolution and LiveCode
that provided the ability to build a standalone for the iOS
and Android?  What is the earliest version that works on
todays Android and iOS?

Are there known compatibility issues that I should try to
avoid while programming the desktop versions so I will
be able to build the Android and iOS standalone without
having problems?

I do not currently have a mobile device for testing so any
related info I need to consider is appreciated.

John Balgenorth