WARNING: This only composites onto a preselected set of backgrounds. There's no option to export with, say, a mask or transparent background. If you're looking for just a basic green screen app, this ain't it.

it is slow but it does work even with custom backgrounds, happy espically withonly being 4$but that being saif teh export quality is garbage and cant be used

Thought I would give this a spin before investing for the full version. Unfortunately, on my Macbook Pro w/El Capitan the application crashes immediately upon loading a jpeg. The image was approx. 100kb and 640x480. Thank goodness I didn’t try anything larger as it might have brought town the entire system. Very disappointing that you have to pay for an app that doesn’t even try to do what it is intended to do.

I don’t know what the negative reviews are about — from download time (with slow internet, even!) to finished project was literally less than 15 minutes. It was super easy — just put your original image in the designated folder, load your desired background into its designated folder, and click. You can even adjust the settings of your original and your background to better match lighting, pixel quality, etc. I just impressed the crap out of my husband by placing him and his buddies in front of their favorite football stadium. I’m super pleased with this simple but efficient little app.