Dear @bdu,
let me agree with @Kevinkun: the .aia is the easiest way to re-use an already existing app.
For example I've made a "frame" of an app (a generic.aia) in which I've put by default some extensions (like TaifunTools, for example, credits to @Taifun 
) , some default variables, at least one clock, a splash screen, the structure of a couple of "virtual screens" (see related tropic :How to use Virtual Screens), the BluetootClient....
Depending on which type of app you develop more, you can add files_management, TinyDB, or whatever.
To this purpose you can have different frames in various .aia files, like they were a library, among with you can select the most suitable at a time.
Best wishes.
1 Like