setting up for multiple deployment

[witeowl]

I'll apologize in advance: I know I read this somewhere, but I've searched and searched and just can't find it now.

If I'm developing an app which I want to deploy both online and in iOS, what is the best way to set things up so I spend as little time as possible duplicating my energies? I thought I remember reading something about writing the app as one mainstack, and then creating a substack for each deployment option, or creating a mainstack for each deployment and having each mainstack call the substack... or something like that.

Can anyone clarify or point me to the right place?

Thanks.