When I switch to LEX, one/one.app
opens and it has a beautiful left navigation menu and a header as well. From Account detail page, on click of a button I need to open a different lightning app i.e
/namespace/AccountModificationRequestApp.app
Now this is working fine but the AccountModificationRequestApp.app doesn't have the lightning look and feel since its missing the navigation menu & header.
Is there any way to include them in custom lightning app?