Can we add an app that we made in MIT ai2 and put it in another MIT ai2 App?
If so, then how to do it? Please Help 
Do you want to merge two projects? Read this -
You only need to download the Aia file and then upload the Aia file to another app builder.
Follow this method:
1.download aia project
2.Upload aia project to other app builders
So I want to upload it on another MIT app inventor app.
Can we do that?
Yes 
You only need to upload the aia file to another MIT app inventor.
I think you should try it
Hello
Your question is unclear. What you do depends on what you mean by
If you mean can I launch (or start) an App Inventor app from another App Inventor app, the answer is yes. Use the ActivityStarter. Using the Activity Starter.
If you want to do something else, please explain in more detail what you want to do and how you expect it to work. Possibly you just want to add a Screen to your existing app?
Need one app contain two panels, each panel opens app inside it and act like part of screen or split screen
clear example if you have two dash cam one front and other rear how to view both inside one screen of app created by MIT app inventor side by side
you can call both with activity starter but how to view both in one app and control like open app normal what is the benefit ?
instead of open both app one app control both side by side in one screen also both app not same app different
