I am trying to make an app. I have got it to work where all my files are in the same folder but it gets very messy and I would like to separate my files into separate folders of the structure: Start, Prelogin, andFirebaseLoginScreen`. So is what I am trying to do possible in kivy?   
I have tried #: import name x.y.z as the pointer where x is the folder name, y is the name of kv-file and z is the class in kv-file I want to import, but I get so many weird errors when I try to do it. I have pretty much added every folder and everything to my PYTHONPATH but nothing works. 
Start contains main.py and main.kv where main.kv then points to the screenmanger in ``Prelogin. Prelogin contains some files that consist of labels and text about the app and then points to the screenmanger in FirebaseLoginScreen. The FirebaseLoginScreen contains a lot of files for the login system.
The answer is simply "yes", there's nothing special about the import parsing in kv language, or in Python when using Kivy. If you're having issues, it's because what you're attempting is wrong or insufficient, which isn't possible to debug from the amount of information you've given.
If you'd like to follow it up, post another question with an example that you think should work given your PYTHONPATH manipulations.
Is it possible to have a folder-based structure in kivy?