Use APKPure App
Get ChromaKey old version APK for Android
It is an application that can easily create chroma key images.
It's easy to shoot, so you can retake it as many times as you like.
When you have a video you like, save it.
Background shooting, chroma key shooting
Recording time up to 10 seconds for both
Chroma key shooting
You can choose greenback or blueback.
You can change the threshold. (0-100)