This app is a must have for every video enthousiast who uses their iPhone (Im pretty sure that its even cooler on an iPad but I aint use one) for video editing. It makes it a powerful creation tool. The keyer works surprisingly well, and its probably the only one that lets you use your own backgrounds from your Camera Roll, plus it lets you apply a chroma key on any of your footage from your Camera Roll instead of forcing you to film with the app itself. It works just great, I love it. The option to add some keyframes over the timeline to apply some movement brings this to an other level. Thank you for making such a great app !
Orfaz about Green Screen Movie FX Studio, v1.74