It's the full version, I've had it about 6 months now and it's great. Only discovered recently that I didn't need a laptop to make it work
I bought an extra copy today for my wife's phone, got it from the App Store no problem. The pic of the first screen on the App store shows a light, speaker symbol, steam loco wheels etc, 8 more symbols than my iPhone's cab, points, signals and options.
Weirdly I tried finding it on my iPad just now and it come up 'no results'. Went and searched using the iPhone and it's still there in the App store!