Use APKPure App
Get Multi Windows old version APK for Android
Create new look of your install apps into single window pop up.
Using this app you can create new look of your install apps into single window pop up.Now Easily switch from one app to another using the same window.Starts Automatically on boot.Chosse diffetent colours of window theme.
Easily find all you apps in one place.Multi Window is free application just download and enjoy....