The bad:
App opens in portrait mode, but can only shoot videos in landscape mode (which I hate using on any handheld device)! No ability to edit videos you’ve previously shot against a green screen. Huge download size. No ability to adjust sensitivity if green screen effect. Doesn’t come anywhere close to a professional looking green screen effect.
The good.
It’s free. It comes with some nice looking backgrounds (which explains the huge download size). Sure you could find and snag backgrounds from elsewhere, but it takes time to wade through all the trash the internet throws at you in order to find something you actually want.