Both apps I have created in B4A have approx. 10 activity's in each project.
Is there a way I can convert then both together to one app and view them in B4A like if it was one app?
You have two options.
1. Use Project - Add Existing Module to add all the modules of one app to the other (except for modules with the same name).
2. Compile one of the apps to a library and then add the library to second project.
In both cases the main module will not be included.