People talk about “Appsmashing” (combining apps as part of a workflow). I don’t like the term. I’ve always used a combination of software on computers and iPads.
Like this for example,
We used, iMotion HD (because its free), Do ink Green Screen, Paper 53, iMovie and Garageband.
Here you can see us hard at work (or more like play!). We used Airplay (Reflector/Airserver) on the Laptop so the children could see the outcome and make shared decisions about the framing of the objects.