Use APKPure App
Get Overlay Camera old version APK for Android
App is NOT FREE. Its a popup mirror(camera) which always run on top of any app.
Simple an easy to use overlay camera that creates a floating window at the top of any app.
Features:
-> Swap camera from floating window.
-> Resize your floating window according to your need.
Note: App is free to download but you must purchase it after open to start work and it will not take any pic.