I know this is possible if you use advanced workflows (Globiflow). For us, we do this for event planning. Once the event app item is created and a certain trigger is clicked, it creates app items with copied data into new app items for speaker info, technology info, food info, and other apps.
So the trigger creates the new app 2 record and copies the data over at the time of app 2 creation. I have been told by support that it cannot happen if app 2 is already created and you just want to copy data over. That may have changed in the last year & a half but that is what I learned.