I stumbled across an app for the SCW while browsing on my Kindle. It was cheap so I thought I would take a risk and was quite happy with what I got.
It is a decision game that features four characters, an Asalto, Militiana, Nationalist pilot and Falangist nurse.
You get a body of text and then several options for your character to take, the game progresses according to your decisions, sometimes the character's paths will cross.
You also get some nice maps and photos, explaining the course of the war and territory held.
I have played it through twice now with a different result each time so it has plenty of replay value.
It is called 'Divided We Fall' and is by Hosted Games, cost is £1.24.